USPS 3 in 1 measurement tool, flat envelope thickness gauge, mail shipping tool

Description

USPS 3 in 1 measurement tool, flat envelope and large flat envelope thickness gauge, mail shipping tool
3D Printed
One slot is 1/4" for maximum first class letter envelope.
Another slot is 3/4" for maximum first class large flat envelope.
USPS 3 in 1 measurement tool,
thickness gauge,
post office template,
gauge,
slot,
postal tool,
small business tool,
shipping tools