Fluffy boy of the Dark World—Ralsei in S–XXXL with measurement fields for robe and hat clearance. The Deltarune Ralsei Cosplay Costume is a soft indie-game favorite.
Sizes
S–XXXL plus height/chest/waist/hips fields.
Hat and scarf
Thick wigs or scarf layers need noted head/neck room in other details. Between letters, take the larger. Hand measurements can be off by 1–3 cm.
Dark-world tips
Halloween and indie-game cons suit Ralsei looks. Soft shoes. Match letter size, fill fields when unsure, and keep the scarf from covering the smile for photos.