MyPartyShirt Fantastic 4 Adult Costume out of 5 stars 3 ratings. Price: $ - $ Size: Select Size Chart To buy, select Size. Add to Cart. Share. Customers who viewed this item also viewed. Page 1 of 1 Start over Page 1 of 1. This shopping feature will continue to load items when the Enter key is pressed. /5(3). Our seasonal costumes keep you dressed up for work parties and weekend ragers whether it's St. Patrick's Day or Cinco De Mayo. We also offer life sized adult mascot costume rentals too. Our adult sizes range from extra small to 6X for the ladies, and up to double extra large for men, and in some cases larger.