Diameter will vary based on part and quantity. Most components and quantities are able to be placed on 7’’ “mini-reels” otherwise if they do not fit they will be placed on larger reels. If you need a specific reel size/diameter, specify in the order notes when ordering a Digi-Reel. Please see below regarding various reel sizes and info:
https://forum.digikey.com/t/importance-of-tape-and-reel-specs/4790
