If you have ever volunteered for a booster club, you know that uniform season arrives with a surprising amount of homework. Someone has to pick colors, approve a design, collect sizes, and make sure the finished jerseys will actually be allowed on the field or court. That last part is where a lot of well-meaning parents get tripped up, because high school uniforms follow a detailed rulebook that most families never see.

The good news is that the rules make sense once someone lays them out in everyday language. This guide walks through the NFHS uniform rules for football and basketball, explains why they exist, and gives you a practical checklist for your next order. Keep it handy before you sign off on a mock-up, and you will save your coaches, your officials, and yourself a lot of stress.

Who Writes the Rules, and Why Your School Follows Them

NFHS stands for the National Federation of State High School Associations. It writes the playing rules that most state associations in the United States adopt for interscholastic sports, including football and basketball. When a referee tells a player to change a jersey or leave the game until an undershirt is fixed, the referee is usually enforcing an NFHS rule.

Each sport has its own committee, and each committee reviews the rules every year. Some years bring big changes, and some years bring only small editorial tweaks. Because of that, a uniform that was perfectly fine a few seasons ago can fall out of step with the current book. State associations can also adopt certain options, such as commemorative patches, so it is always worth checking with your state body or your athletic director for local details.

The reasons behind the rules are practical. Officials need to identify players quickly to track fouls and penalties. Scorekeepers need to read numbers from across a gym. Spectators and broadcasters need to tell the two teams apart at a glance. Almost every uniform rule ties back to one of those needs, which is helpful to remember when a rule seems oddly specific.

Football Jersey Colors: Dark at Home, White on the Road

In high school football, the home team wears dark jerseys and the visiting team wears white. The current NFHS jersey rules require every home team jersey to be the same dark color or colors that clearly contrast with white. The body of a home jersey may not include white, except in a few specific places that the rule lists.

The visiting team does the opposite. The body of a visiting jersey, which the rule defines as the area inside the shoulders, including the yoke, below the collar and down to the bottom of the jersey, must be white. Contrasting colors can appear only in the allowed spots, which we cover in the next section.

The rule also says the visiting team is responsible for avoiding similar colors. If there is any doubt about whether the two teams look too alike, the referee may require the home team to change jerseys. For boosters, the takeaway is simple: a full football uniform program needs a true dark home set and a true white away set, and a gray or light-colored “alternate” can cause problems on game night.

What Counts as White on a Visiting Football Jersey

This is where many design ideas run into trouble. On a white visiting jersey, contrasting colors may appear in only a handful of places. The first is the jersey numbers themselves, along with the school nickname, logo, mascot, school name or player name within the body or on the shoulders.

Beyond that, the rule allows a decorative stripe that follows the curve of a raglan sleeve or the shoulder seam, as long as it does not exceed 1 inch at any point within the body of the jersey. Stripes added in the shoulder area after production are limited to 1 inch each, with a combined total of no more than 3.5 inches. Color is also allowed within the collar up to 1 inch wide, and in a side seam insert up to 4 inches wide.

The same list of exceptions applies in reverse to home jerseys, where white may appear only in those places. So if a designer proposes a bold white panel across the chest of a dark home jersey, or a wide colored band down the front of a white away jersey, that is a design to rethink before production. Asking your supplier to mark these measurements on the mock-up makes the review much easier.

Football Numbers: Size, Width and Contrast

Football numbers have some of the most specific requirements in the whole uniform rulebook. Players are numbered 0 through 99, and any number preceded by a zero, such as 07, is illegal. Numbers must be Arabic numerals, clearly visible and legible, and they must appear on both the front and the back of the jersey.

Size matters a lot here. Including any borders, the numbers must be at least 8 inches high on the front and 10 inches high on the back, centered horizontally. The body of the number, meaning the continuous bars and strokes without the border, must be approximately 1½ inches wide. The color and style must be the same on the front and the back.

Contrast is the last piece. The entire body of the number must be a single solid color that clearly contrasts with the body color of the jersey. A navy number on a black jersey or a light gray number on a white jersey may look sharp in a design file, yet it can be very hard to read from the press box. When you compare quotes, look for NFHS-compliant football uniforms where the number sizing and colors are spelled out on the proof, so you can check each measurement against the rule before anything is printed or stitched.

Logos, Flags and Patches on Football Uniforms

Manufacturers like to put their branding on the gear they make, and the rules allow it within limits. Jerseys and pants may carry only one manufacturer’s logo or trademark on the outside, and that logo may not exceed 2¼ square inches or 2¼ inches in any dimension. Sizing labels, care labels and other non-logo labels on the outside of a jersey or pants are illegal.

One American flag, no larger than 2 inches by 3 inches, may appear on each item of uniform apparel. By state association adoption, commemorative or memorial patches up to 4 square inches may also be worn for special occasions. If your team wants to honor someone with a patch, check that your state has adopted that option and keep the patch within the size limit.

There are a few other design details that officials watch for. A transverse stripe on the sleeve below the elbow is illegal. Jerseys, patches and undershirts in a color that resembles the football are also prohibited, which is why you will rarely see a brown or tan football jersey at the high school level.

Fit, Tucking and the Pants That Go With the Jersey

A football jersey must be long enough to reach the top of the pants, and it has to be tucked in if it is longer. It must completely cover the shoulder pads and every pad worn above the waist on the torso. The rules also require jerseys to be unaltered from the manufacturer’s original design, so cutting a jersey shorter or knotting it at the back is off the table. Tear-away jerseys, or jerseys altered to create a knot-like protrusion, are illegal.

Pants must completely cover the knees, the thigh guards and the knee pads, along with any portion of a knee brace that does not extend below the pants. That means sizing is part of compliance. A pant that fits in August may ride up by October after a growth spurt, so it helps to order a few extra sizes and keep a small inventory for mid-season swaps.

For parents, the practical tip is to try the uniform on over full pads before the first game. A jersey that looks fine on a hanger can come up short once shoulder pads are underneath, and the sideline is a stressful place to discover that.

A Football Change Coming in 2027: Arm Sleeves

The NFHS has announced a new item in the football equipment rules that takes effect with the 2027 season. Arm sleeves, whether attached to a shirt or worn separately, that are manufactured to enhance contact with the football or an opponent must meet a specification from the Sports and Fitness Industry Association at the time of manufacture.

Under the new language, those arm sleeves must carry a permanent, legible replica of the SFIA arm sleeve seal on the exterior. The NFHS explained that the new specifications closely align with the existing rules for football gloves, which already carry a similar seal.

If your booster club buys arm sleeves as part of a spirit pack or uniform bundle, this is worth adding to your planning notes now. Ask any supplier whether the sleeves you are buying will carry the seal, especially if the order will still be in use for the 2027 season.

Basketball Flips the Colors: White at Home

Here is the detail that surprises a lot of multi-sport families. In high school basketball, the home team wears white and the visiting team wears a dark color that clearly contrasts with white. That is the reverse of football. The NFHS reinforced this traditional designation in its 2026-27 basketball points of emphasis, noting that it supports game administration and helps officials, scorers and spectators.

The torso of a basketball jersey must be a single solid color with no designs in the fabric. The NFHS defines the torso as the area from an imaginary line at the base of the neckline out to each armhole, down to the bottom hem and from side seam to side seam. The back torso must be the same single color as the front.

Gray has its own rule. If a team chooses gray, it must be for the away jersey, and the gray must be closer to black by at least 70 percent. A light heather gray road jersey, however stylish, would not meet that standard.

Basketball Numbers Use Only the Digits 0 Through 5

Basketball has a number rule that football fans may not expect. Under the NFHS basketball uniform guide, the legal numbers are 0, 00, 1 through 5, 10 through 15, 20 through 25, 30 through 35, 40 through 45 and 50 through 55. In other words, each digit must be between 0 and 5. A team roster may not include both 0 and 00.

The reason goes back to how officials report fouls. A referee signals a player’s number to the scorer’s table using fingers, one hand per digit, so digits higher than five would be impossible to show cleanly. That is why you will not see a 23 sitting next to a 7 on a high school roster.

This is a common snag for families whose kids want to wear the same number they wear in football or club ball. Have that conversation early, ideally before jerseys are ordered, so players can pick from the legal list and nobody is disappointed when the box arrives.

Number Size and Color on Basketball Jerseys

Basketball numbers must be at least 4 inches high on the front and at least 6 inches high on the back. Each must be at least ¾ inch wide, not counting the border, and centered vertically and horizontally on the visible part of the jersey. They must be plain Arabic numerals, with the same style and color front and back.

No more than three colors may be used in a number. The number can be a solid contrasting color with up to two solid borders of ¼ inch each around the entire number, or a solid contrasting color with a shadow trim of no more than ½ inch on part of the number, used with one ¼-inch border. If a team color is used as a border, it counts as one of the three allowed colors.

One change took effect with the 2024-25 season after a five-year phase-in: the number can no longer be the same color as the jersey, even with a contrasting border around it. The NFHS approved that change back in 2019 and gave schools time to budget for new uniforms. If your program is still using older sets where the numbers match the jersey color, those sets no longer meet the rule. Programs shopping for a replacement can look at options such as Full Gorilla basketball uniforms and compare the number treatment on each proof with the color options above.

Names, Logos and Trim on a Basketball Jersey

On the front of a basketball jersey, lettering may include the school name, nickname, logo name or an abbreviation of the official school name. Since the 2024-25 season, a school logo or mascot image may also be centered directly above the number in place of a name. Lettering must run horizontally, may be arched, and must sit at least 1 inch away from any point on the numbers. Decorative accents such as a paw, crown or star are allowed only above the number.

The back of the jersey may carry the player’s name as well as the school name or nickname. Above the neckline, roughly the area from the base of the neckline up to the shoulder seam, there are no color or design restrictions other than those on identifying names. A school or conference logo may sit at the apex of the neckline, in the matching spot on the back, or in a side insert.

Trim around the armholes may not exceed 1 inch. Side inserts must be centered below the armpit, no wider than 4 inches in total (2 inches on each side of the seam), and the same width on every jersey, though they may be any color or design. A single manufacturer’s logo up to 2¼ square inches is allowed, and an American flag up to 2 by 3 inches may appear as long as neither interferes with the number.

Undershirts, Shorts and Matching Accessories

Basketball rules reach beyond the jersey. Since the 2023-24 season, undershirts worn under a visiting team jersey may be black or a single solid color similar to the torso of the jersey, and every teammate wearing an undershirt must wear the same solid color. Uniform bottoms on teammates must be like-colored, though players may wear different styles.

Players may fold or roll their shorts at the natural waistband seam, provided the shorts still meet the rule limiting them to one visible manufacturer’s logo. Headbands may be up to 3 inches wide, and hair-control devices are exempt from color restrictions. Sleeves, tights and compression shorts also come with matching requirements, so it helps to buy these accessories in team quantities in one approved color instead of letting each player pick their own.

The NFHS also emphasized in its 2026-27 points of emphasis that uniforms must be worn as intended at all times. Jerseys designed to be tucked in must stay tucked, front and back, and a player out of compliance is directed to leave the game until it is corrected. Coaches are expected to handle uniform checks before tipoff, and a parent who knows the rules can be a real help.

A Booster Club Checklist Before You Order

Before anyone approves a design, gather the current rules for each sport from your athletic director or state association. Then walk through the proof line by line. For football, confirm the home set is fully dark and the away set is fully white, check that stripes and inserts stay within the allowed widths, and verify that front numbers measure at least 8 inches and back numbers at least 10 inches. For basketball, confirm the home jersey is white, any gray road jersey is dark enough, every roster number uses only digits 0 through 5, and the numbers contrast with the jersey on their own.

Next, ask practical questions of whichever supplier you consider. Will they mark measurements on the mock-up? Can they provide documentation for your athletic department? Some suppliers say so directly on their sites; for example, fullgorillaapparel.com states that certificates of compliance are available with every football order, a detail that can make the approval process simpler. You can explore the details at fullgorillaapparel.com and compare them with any other vendor you are considering.

Finally, plan for the whole season. Order a few extra jerseys in common sizes, confirm how replacements work if a jersey is torn or a new player joins mid-season, and leave enough lead time that your team is not wearing borrowed gear on opening night. Keep a copy of the approved proof with your booster records so next year’s volunteers know exactly what was ordered.

Game Day Mistakes That Are Easy to Avoid

Most uniform problems on game day come from small things. A player shows up in a different colored undershirt from their teammates. A basketball player wants to wear number 8 because it is their football number. A football jersey looks great until shoulder pads go on and it no longer reaches the pants. Each of these is preventable with a quick check in the locker room.

Another common mix-up happens when a school buys a trendy alternate jersey. Alternates can be a lot of fun, yet they still have to follow the same color rules as the regular home or away set. A gray football alternate on the road, or a colorful basketball jersey at home, may simply not be usable in a game under NFHS rules.

The last frequent issue is wear and tear. Faded numbers, cracked printing and loose stitching can make numbers hard to read, which defeats the purpose of the contrast rules. A quick review of last season’s uniforms each summer gives your club time to replace the worst pieces before the first whistle.

Keeping Your Team Ready All Season Long

The NFHS uniform rules can feel like a lot at first, but they boil down to a few simple ideas: teams should be easy to tell apart, numbers should be easy to read, and uniforms should be worn the way they were designed. Once you understand those goals, the specific measurements start to feel a lot more reasonable.

For parents and boosters, the best approach is a calm one. Work with your coaches and athletic director, check every proof against the current rules, and keep good records of what you ordered and why. Rules do change from year to year, so a quick look at the NFHS website each spring will keep you current.

A well-planned uniform order lets players focus on the game, gives officials one less thing to worry about, and helps your school look its best in front of the home crowd. That is a great result for a few hours of careful volunteer work.