Personalized Ohm Mighty Physics Tote Bag. Ohm Mighty Physics with ohm mighty in coiled text inside a yellow burst. Tickle the funny bone of your favorite science geek with this design for birthdays, holidays, back to school and graduations for your favorite scientist Light Weight 6oz 100% Cotton Tote Bag. 14.5"W x 15.5"H, handles are 20" in length.