Got a couple of 6" verniers, but don't use the old school one with no digital or dial much anymore because of old eyes. Digital is easier & converts fast. Also have a set of 0'~4" micrometers, 0"~6" depth micrometer & a dial indicator. Covers most situations, I can probably count on one hand the number of times I wish I had a 12" caliper, but on those occasions, I REALLY want one! Usually scrounge up some chunk of steel to use as a guage block with the 6 inch caliper.