If you're looking for more details about the dress or the episode in which she wore it, please provide more information, and I'll do my best to assist you!
202 × 360
Source:https://www.spotern.com/en/spot/tv/gossip-girl/110938/blair-waldorf-s-leighton-meester-red-dress-as-seen-in-gossip-girl-4x02
374 × 374
Source:https://gem.app/search?terms\u003dblair%20red%20dress%20sz
409 × 320
Source:https://www.lizdress.com/leighton-meester-blair-waldorf-red-cap-sleeve-formal-prom-dress-gossip-girl.html
901 × 900
Source:https://theeranyc.com/products/vintage-blair-dress-1
428 × 300
Source:https://www.xdressy.com/blair-waldorf-orange-red-ruffled-dress-1678.html
400 × 178
Source:https://www.ebay.com/itm/225846451432
322 × 400
Source:https://www.burlingtoncountytimes.com/story/news/2011/11/07/gossip-girl-recap-for-i/17323496007/
600 × 600
Source:https://www.aliexpress.com/item/32252749267.html
600 × 427
Source:https://www.pinterest.com/pin/463941199098978628/
155 × 110
Source:https://www.lizdress.com/leighton-meester-blair-waldorf-red-cap-sleeve-formal-prom-dress-gossip-girl.html