Stacking is a flat-style Icon from Core Flat set.

The Stacking icon shows two rounded rectangular blocks arranged vertically, each with a centered darker tab along its top edge. Drawn in the flat style on a 14px grid, its simple two-color construction keeps the layered form clear and adaptable. Use it for layer controls, stacked content, storage interfaces, file organization, and product or inventory layouts. It belongs to Core Flat set in the Core family.