Spell Component Pouch
A spellcaster with a spell component pouch is assumed to have all the material components and focuses needed for spellcasting, except for those components that have a specific cost, divine focuses, and focuses that wouldn’t fit in a pouch.
Source Core Rulebook
Empty Weight: 1/4 lb.1 Capacity: 1/8 cubic ft./2 lb.1
1 When made for Medium characters. Weighs one-quarter the normal amount when made for Small characters. Weighs twice the normal amount when made for Large characters. Containers carry one-quarter the normal amount when made for Small characters.