This pouch will fit most of the popular OC Pepper spray cannisters sizes out in the marketplace. Fits MK3 or MK4 size sprays Pouch will fit from 4.0'' to 8.5'' tall objects. Up to 1 5/8'' diameter. The bottom flap and the top flap have hook and loop fasteners that allow you to customize the height of the pouch. The top flap is also completely removeable. Adjustable OC pepper spray pouch with MOLLE strap.