Yes there are 2 different reg. sizesAnsweryes - nfl is bigger AnswerNot according to Wilson...the official supplier to the NFL since 1941 and also official football of the NCAA:
Why do the NFL and NCAA use different size footballs
Balls are the same size...only difference is that NCAA balls have the white stripes.
In addition to the above link, note this from the Wilson.com product description of the "F1001 - NCAA 1001 Game Ball" - "Pro Pattern - matches NFL specifications."
TAnswerRegulations for NCAA ball can be found on page 28 of this "NCAA 2004 Rules and Interpretations" document: http://www.ncaa.org/library/rules/2004/2004_football_rules.pdf
Key points: 8 laces 2 one-inch wide stripes located 3" to 3 1/4" from the ends...only on the two panels adjacent to the laces. Long circumference range: 27 3/4" - 28 1/2" Short circumference range: 20 3/4" - 21 1/4" tip to tip overall length: 10 7/8" - 11 7/16" Inflation: 12 1/2 to 13 1/2 psi Weight: 14 to 15 oz. No pro football logos allowed. No advertising, Exceptions (1) ball manufacturer's name or logo, (2) AFCAAnswerThis is a nice document about how the balls are made:
This describes the NFL ball:
It is an inflated rubber bladder filled with 12 1/2 to 13 1/2 pounds of air, covered with pebble grained leather (pigskin) of tan color. It approximates a prolate spheroid with a long axis of 11-11 1/4 inches and a circumference of 28-28 1/2 inches. It weighs 14-15 ounces. The ball bears the signature of the league commissioner. Until recently the home team was responsible for providing a set number of game balls for game day, but the league (NFL) now makes the officials inflate and certify the official game balls, including a certain number marked with a K to be used only for kicks. One source says a quantity of 36 balls for outdoor games and 24 for indoors is supplied.
No. NFL footballs are longer and skinnier than college balls. This makes it easier to throw an NFL ball but easier to kick an NCAA ball. Both the NCAA and the NFL footballs have the same specifications. The specifications of these footballs are: Short Circumference: 20 3/4"- 21 1/4": Long Circumference 27 3/4 "- 28 1/2 "; Weight: approximately 14-15 oz.
Both the NCAA and the NFL footballs have the same specifications. The specifications of these footballs are: Short Circumference: 20 3/4"- 21 1/4": Long Circumference 27 3/4 "- 28 1/2 "; Weight: approximately 14-15 oz. In college, the football includes a white stripe making it easier to view in flight. Otherwise, contrary to popular belief, the specifications, according to rule books, are identical.
The NCAA ball is slightly smaller and has white stripes inset from either end, running halfway around the ball (on the two panels that join the laces). Typical collegiate balls are 11.25 to 11.5 inches long by 6.7 inches max diameter. Official NFL footballs are by 6.7 to 6.8 inches in diameter and with a length of 11.9 inches. This is defined by: Short Circumference: 20 3/4"- 21 1/4" Long Circumference 27 3/4 "- 28 1/2'
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