Snap-Off Toilet Base Leveling Shim
A tapered 84 x 44 mm shim that slides under a rocking toilet bowl on uneven tile, filling any gap from 1.2 mm to 7 mm with a rigid PLA wedge instead of squishy rubber or stacked coins. Four snap grooves on 14 mm centres (1 mm web) let you break off the protruding heel so the shim sits hidden under the base for caulking, and nine 0.7 mm grip ribs on the tip keep it from creeping out and key the silicone; the heel edge is arced to follow the bowl skirt.
bathroom toilet shim leveling