Taken from Lollar website:
There is no definitive way of knowing exactly what thickness of shim(s) your guitar will need. The exact set of the neck can vary from guitar to guitar so there is no way of knowing for sure until you’ve got the instrument on the work bench.
Gold Foil shims are black. Our best recommendation is to purchase our shim pack, which contains the six most commonly used shims. These can also be stacked to achieve a variety of heights.
The Shim Pack includes the following: 2@1/32,” 2@1/16,” 1@3/32,” and 1 @1/8.
No returns on shims. No “customizing” of the shim pre-pack.