Why not have a fancy dress party and invite guests to wear Letter 'M' Costumes. Costumes starting with the letter M range from Morphsuits to Mermaids and everything in-between. We have a huge array of costumes for this letter. Morphsuits are one of the most popular fancy dress trends to date and we stock a huge variety of styles so you can decide which one best suits your personality. Transform into a stunning mythological creature with our range of Mermaid costumes crafted in beautiful fabrics. This consonant has so many options. Go to Wonderland dressed a mad hatter, or look every inch the Hollywood star dressed in one of our Marilyn Monroe dresses. Let us present you with more Letter M costumes than you could possibly imagine.