Limited Edition Binding Babies® Rainbow Pop Medium measures 4” height by 2“ width. They hold up to 2.5” wide folded bindings or up to 2.25” lace, trims, and ribbons perfectly. It's a way to store and sew on your binding. Simply slip your binding or trim into the slot, wrap around the body, and add a pin or clip to hold in place. You can set it on a shelf until your ready to add binding to your quilt or trim to your fun sewing project.