The Kcook Multi steam tray has a 7.2 litre air capacity.Base only: 9.5H x 38L (including carry handles) x 23W cmComplete: (Base + sheld+ lid): 155H x 38L - (including carry handles) x 23W cmIncluding storage unit: 25H x 38L (including carry handles) x 23W cmWithin the instruction manual there are guidelines for max quantities of foods they can steam in it. Click here to download the Kcook multi User Manual.