Showing your fandom with T-shirts is one of the hallmarks of being a Sci FI fan. Here are two companies who excel at creating the T-shirts you will crave:
Her Universe is my favorite fandom company. I love that the company fits women of all sizes and are super comfy!!!
Loot Crate has super cool T-shirts in its monthly crates and they also have a T-shirt only subscription service. Here are some examples of their shirts:
Check these amazing companies out !