Here's how big the LEGO 75313 UCS AT-AT is (size comparison) - Jay's Brick Blog
My ATAT MOC with full interior with a coffee machine and toilet and Speeder bike bay with 4 bikes and 40 seats for troopers and a hot tub, blaster rack, engine room,
MOC/MOD] Motorized Plus-Size AT-AT, but not walking - LEGO Star Wars - Eurobricks Forums
AT-AT MOC (plus-sized -- but not super big) - LEGO Star Wars - Eurobricks Forums