This is a Saturday/Sunday by Anthropologie velvet jumpsuit. The RN 66170 on the care tag is associated with Anthropologie/Urban Outfitters, and the branded Saturday/Sunday label confirms the line.

Listing information

Brand: Saturday/Sunday by Anthropologie

Item: Velvet short-sleeve jumpsuit / one-piece

Size: Women’s Large

Color: Deep navy blue

Fabric: 95% polyester, 5% spandex

Made in: Indonesia

The fabric appears to be a soft stretch velvet/velour, giving it a plush, slightly lustrous finish.

Design details: Surplice/wrap-style V-neckline, relaxed kimono/dolman short sleeves, gathered upper bodice, defined elasticized waist, side/front hip pockets, relaxed tapered legs, and pull-on styling. The silhouette has a slightly slouchy, lounge-inspired look but the velvet makes it dressy enough for holiday or evening wear.

From your photos, the approximate measurements appear to be:

Pit to pit: about 21–22” laid flat

Overall length: about 46–47”

Leg opening: about 8” across laid flat

Best resale title

Anthropologie Saturday Sunday Velvet Jumpsuit L Navy Blue Dolman Wrap V Neck

Other strong keywords: velour, stretch velvet, lounge luxe, holiday, cocktail, wide waist, tapered leg, relaxed fit, soft, evening, party, minimalist, quiet luxury, one piece.

Resale pricing

Saturday/Sunday was one of Anthropologie’s more casual/lounge-oriented labels, so it generally doesn’t command the prices of Anthro’s higher-end designer collaborations. However, velvet jumpsuits are very seasonal and marketable for fall/holiday.

For this one in excellent condition, I’d try:

List: $48–58

Likely sale: $30–42

Quick sale: $25–30

I’d probably list yours at $54 on Poshmark/eBay and $42–46 on Depop, leaving room for offers.