This funny geologist humor gift will definitely be a hit gifts among rock hounds, geologist, mineralogist, professors, rock collector and those who enjoy geek , geology or scientific humor. Size guide
| | S | M | L | XL | 2XL | 3XL | 4XL | 5XL |
| Length (inches) | 27 | 28 | 29 | 30 | 31 | 32 | 33 | 34 |
| Width (inches) | 20 | 22 | 24 | 26 | 28 | 30 | 32 | 34 |