I use the large one for flash bangs and this small one is the prefect size for OC.
Small Flashbang Pouch
The Small Flashbang Pouch is designed around the Rheinmetall Defense 1/3/9 Banger grenade. It also fits a 40mm grenade round as well. This pouch uses one channel and four rows of MOLLE space. The lid is adjustable and fully removable by way of a Velcro interface on the back of the pouch. There's an elastic band around the body of the pouch to provide retention.
As with all ATS Tactical Gear-made equipment, it's covered by a lifetime warranty against defects in materials and workmanship.