Homo erectus is thought to be the first of our ancient ancestors to have had a brain comparable in size to our own. This Homo erectus skull keychain is accurately hand carved and cast in genuine pewter. You might also want to check out the brass version which is on sale because I’m phasing out the brass finish in order to simplify my product line: https://www.etsy.com/listing/611632179 Dimensions (not including keyring): 3.3 cm long (including loop X 1.9 cm wide X 2.1 cm high Weight: 17.0 Grams