Disney Store 6-12 Tinkerbell Costume fits like 3 to 9 months

This spectacular costume consists of a one piece green dress with purple flower trim and attached mesh wings. The body is lined with a silky green onesie that has 3 snaps at the crotch. It is in perfect condition. My daughter wore this costume on Halloween night with nothing underneath when she was wearing 3-6 months clothes and it was roomy. We tried it on now that she is wearing 12 month clothes, and although she could get it on, it was very snug and definately too short in the crotch. I do not recommend this size after 6-9 months clothes. Weighs 3.9 oz.

Old Navy 6-12 months Cowgirl Costume fits like 3 to 9 months

This really cute two piece costume includes a long sleeve onesie and velour pants with fringe. The onesie has brown and pink screenprinting that resembles a vest and handkerchief tied at the neck, 2 snaps on the left shoulder, and 3 snaps on the crotch. The pants are made of a luxurious velour that is white with light pink cowprints and fringe. The waist is all elastic. It is in perfect condition. My daughter wore this at a Halloween event with nothing underneath when she was wearing 3-6 months clothes, and it was roomy. We tried it on now that she is wearing 12 month clothes, and the top (onesie) still fits fine, including being long enough in the crotch. The pants still fit in the waist but they are about 1.5 inches too short. Weighs 5.7 oz.

Old Navy 12-18 months Mermaid Costume fits like 3 to 9 months

This costume is spectacular, and it is in perfect condition. The arms and upper chest are made of a bone colored mesh material with aqua mesh attached to resemble fins. The dress is blue with sequins, and the tail portion is green and aqua mesh. My daughter wore this at a Halloween event with nothing underneath when she was wearing 3-6 months clothes, and it was roomy. We tried it on now that she is wearing 12 month clothes, and although she can still get it on, it is very snug in the arms and upper chest (the mesh portions). Weighs 2.5 oz.

Girls Toddler Ballerina Costume fits 12-18 months

Includes white tutu trimmed with light pink sparkly material and bows, and pink ballet slippers with a bow. The ballet slippers have a no-skid bottom and are very, very clean even on the bottom. There is not a size marking on the slippers, but I compared them to my peanut's shoes (she wears a 4) and it appears that they will fit an infant 4-5 shoe. You could stuff the toes with kleenex for a smaller foot. All pieces look perfect, no flaws. Weighs 1.9 oz.