Rulers are a normal school supply, so get your measuring done with Sonic! This black ruler has inches and centimeters...and some red words you can't really read! The white line is a Sega copyright and number. Look at the Sonic face though, he only has 2 spikes. This is strange because all other official art shows him with 3. This ruler is uncommon. It is from 1992. Was it part of a set?