Madpax Blok Backpacks (Halfpack, Go Green) Fullpacks measure 18 H x 14 W x 8 D. Halfpacks measure 14 H x 12 W x 6 D. Fullpacks feature two side zipper pockets, a large inner compartment, laptop pocket with security strap and a chest strap. Halfpacks feature a large inner compartment with a small zippered inner pocket. (No outer pockets.) Both sizes feature adjustable padded shoulder straps.