1.75 inch diameter, made from a military-grade compound similar to heavy-duty rubber.

I bet you already own a classic pair of blue Fat Gripz. You know that thick-grip lifting activates more muscle fibers, builds your forearms and crushing strength, and adds a challenging progression to basic lifts. But did you ever wish they could be just a little LESS fat? That would be great for certain exercises... or for those of us who don't have paws like Andre the Giant. Enter the One Series. Instead of the standard 2.25" outer diameter, these are 1.75". That just feels better for some movements, and you'll still get all the benefits of thick-grip training.

– Chris Shugart