Periodic Table of Elements T Shirt Chart Geek Science Chemistry Shirts Mathlete Nerd Funny Retro Graphic Tee FREE SHIPPING DEAL --- Order any 3 (or more) of our awesome graphic shirts and get Free Shipping... Free Shipping Free Shipping!!! PREMIUM QUALITY TEES --- You will instantly love the soft feel and great fit of our shirts! We hand print our graphics right here in the USA, and we only use super-soft, premium brand, 100% cotton tees that look and feel great on men women. Our comfy-soft shirts will seriously become your new favorite! SIZING FOR MEN --- We suggest ordering the size you normally wear in a t shirt. If you are between sizes, you may want to order a size up. (see models and size chart in our imges) SIZING FOR WOMEN --- We suggest ordering the size you normally wear in a t shirt, or order a size down from what you wear in a womens-cut tee. (see models and size chart in our images) SIZING FOR YOUTH / KIDS --- We suggest ordering the size your child typically wears. || Kids 5-7 years = Youth Small || Kids 8-9 years = Youth Medium || Kids 10-12 years = Youth Large || Kids 13-14 years = Youth XL ||