Onion Sizing

Onions range in size from less than one-inch in diameter to more than 4.5-inches in diameter. The most common sizes sold in the U.S. for retail are between 2 to 3-3/4 inches in diameter.

Super Colossal 4-1/2" and UpYellow, Red, and White

Colossal 3-3/4" and UpYellow, Red, and White

Large/Jumbo 3" and UpYellow, Red, and White

Medium 2" to 3-1/4"Yellow, Red, and White

Pre-Pack 1-3/4" to 3"Yellow and White

Small 1" to 2-1/4"Yellow, Red, and White

Boiler 1" to 1-7/8"Yellow and White

Creamer Under 1"Yellow and White

Thanks to the National Onion Associating for the image. Visit there site here.