This link has the various dimensions for spacers and gears.
Bicycles/Maintenance and Repair/Gear-changing Dimensions - Wikibooks, open books for an open world

All gears are 1.6mm thick 9/10/11-speed, only the spacer changes. This is why chainrings are cross-compatible.

Shimano/SRAM 10-speed used 2.35mm spacers. Shimano/SRAM 11-speed uses 2.14mm spacers.

The stack for a Shimano 11-speed is 39.0mm vs 37.2mm for 10-speed. Removing 1 cog gets you to 37.4mm, so it should work on most wheels.

Most likely you'll need to move the last spacer to the inside of the cassette so that you end with a cog, rather than a spacer. For shimano cassettes the 11t cog is special and designed interface with the lockring. On a Shimano cassette you need to retain the smallest cog, meaning you need to lose one somewhere else.