Stacking Shelf

Can someone tell what is Large, what is Medium? What dimensions for the two and weight/load it can take, if available?

Hi there. we got updated sizing:

Medium Stacking Shelf, 12.0" L x 20.0" W x 9" H
Large Stacking Shelf, 16.0" L x 23.63" W x 12.0" H

We don’t have information on load though. Sorry.