Betty’s frills—Beatrice dress build in S–XXXL with measure fields. Distinct from Rem/Ram cape-dress SKUs. The Re:Zero Beatrice Cosplay Costume is the library spirit look.
Sizes
S–XXXL plus height/chest/waist/hips fields.
Petticoat room
Frilled dresses need hip clearance—size up if you wear petticoats underneath. Between letters, take the larger. Hand measurements can be off by 1–3 cm.
Library tips
Halloween and Re:Zero cons suit Beatrice looks. Soft flats. Match letter size, fill fields when unsure, and steam ruffles carefully before posed shots.