Large:L38*W19*H15cm
Middle:L25*W17.4*H10.4cm
Small:L16*W8*H6.5cm
Open feed bins are susceptible to chickens jumping in and scratching so if this is a problem try a “U” shaped open container
and fix it to a wall or place a mesh over the top so their heads can just pop through,
this will stop hens jumping in and scratching around.