All Monday on Mars™ apparel is unisex.

Our shirts, hoodies, and crewneck sweaters are best worn as a relaxed fit. Please use the size recommender and review our size charts below so you can be sure you're getting a well fitted garment. We are a unisex brand and (generally speaking), suggest the following: 

Women - buy the size you'd typically buy! Size up for a slightly oversized fit. 

Men - When in doubt, size up. Especially if you are in-between sizes. If you like your medium sized shirt to have a nice relaxed fit, then you should buy a large Monday on Mars shirt. 

Our recommendation is based on feedback from people wearing our clothing. Everyone is different! Please be sure to check the sizing measurements before purchasing. 

Be sure to keep your Monday on Mars™ apparel out of the dryer. Cotton clothing will shrink in the wash/dry cycle even it's listed as "pre-shrunk." 


Size Chart



Hoodies & Crewneck Sweaters 


Our Large Socks can fit up to a Men's Shoe Size 13 however they may shrink slightly due to the high cotton content.

HEIGHT Just above the ankle Mid-calf
SHOE SIZE (M) 4-8 7-12


One size only. Unstructured unisex "Dad hat" style. 


If you have any further questions regarding our sizing please do not hesitate to contact us at