Yes we sure can! Greetabl fits in most PO boxes, but if the recipient has an extra small box, it may not. Our shipping box is 4x4” and the extra small PO boxes are 3x5.5”. That said, “small” seems to be the most common size and a Greetabl will fit inside one of those!
Here’s a link to PO box sizes for reference: https://www.usps.com/manage/po-box-sizes-popup.htm
Related: post office boxes