These cubicles can be configured as 6x6, 6x8, 8x8, etc - basically, 2' increments). The panels are 48"H. We have enough inventory to do maybe 29 stations or so (depending on size and how they're configured). Even though drawers are not shown in all photos, we DO have drawer assemblies. GLASS TOPS: We only have enough for a couple individual panels - most do not have them. SHELVES: Sorry, we are completely out of overhead shelves.