This double-door sparrow trap comes assembled with a convenient release door located on the side of the trap, providing easy access to the trapped sparrows. The bird trap also has two repeating trap doors. This Sparrow Trap can hold up to 20 sparrows at a time! The mesh size is 1/2 in x 1 in 16 gauge wire. The trap size is 24 in L x 12 in W x 8 in H.