What is the diameter sizing!?
Thanks for your question. The bag dimensions are approximately...
Med = 3.5 in. / Lrg = 4 in. / XL = 4.5 in. (dia.) The neoprene stretches nicely to accommodate different sized reels. If you need help choosing a bag for your reel please contact us for more support.
Nice added protection for the reel when it's in my rod vault.