MINI ROLLYPOLY Folded: 3.5" long x 2.25" wide x 1.5" thickOpen: 4" diameter, 8" tallTotal Volume: 100 cu. in.Belt: Integral Closed LoopAttach: 3" TacTie (sold separately); Siamese SlikClip (included)The Mini Rollypoly (#0207) is a folding dumppouch designed to hold a standard 32 oz. / 1L Nalgene or smaller water bottle. Bungee cord cinch and velcro flap lid secure top. Attach using 3" TacTie (sold separately).