Custom Geocaching Pocket Stamp - TFTC Custom Geocaching Stamp Custom Geocaching Pocket Stamp - TFTC Custom Geocaching Stamp To customize, please click on the 'Customize Now' button on the right. Geocaching can be exciting for everyone and a fantastic way to spend uninteresting days! Stamp impression size is approximately 1.5" x .563". Self Inking Pocket Stamp is built to last for thousands of impressions Ships within 24 business hours from our sunny Jacksonville, FL warehouse!!!