The guard is made for the PSA slab in its standard size. Inside, it measures 81.3 x 6.4 x 136.5 mm (width x depth x height).

19 colours, from solid black to two-tone gradients. The Guard Chooser shows you in advance how your slab looks inside.

Not the regular PSA Slab Case, which is 81 mm wide inside. That is what the PSA Slab Case for PSA Slab + Guard is for: 86.8 x 12 x 142 mm inside, against a guard that measures 86.59 x 10.1 x 141.55 mm on the outside.