Here are four tiny insulators from around the world! 102 Cal to show size! $8 each or take them all for $25 plus actual postage

U-2273 from Portugal - no markings -- no issues

U-2274 really crude insulator -- base firing rest & threaded -- no issues

U-2250 from Turkey -- super crude with glaze crazing but no issues! threadless for cement to pin

U-2275 from Finland -- elegant unmarked insulator - small bruise on skirt