- Ord Chic
- Obsessed Over Luxe
- Ourowe
- Oh Hey Girl Store
- Onlyyo
- Omladies
- Ooh Cherry
- Oak + Ember Boutique
- Orderlady
- Oak & Ivy Boutique
- Oh My Love Fashion
- Oceanshe
- Onlyoudress
- Oshopin
- Oak & Pearl
- OMGwantit
- Onesmirror
- Ootdlady
- One Chic Store
- Oh, Darlin
- Obranded
- OC Avenue
- Oh Gasp!
- Olivia Rose
- OceansCollection
- Onedaysmart
- Onechicday
- Outfit To Date
- Ourostyle
- Oxygenbuy
- Onlymydear
- Ondulations
- Opal & Ruby
- Overshe
- Orchid Bohème
- Ootdgal
- OC Basic Boutique
- Oncetwo
- Oh So Boutique
- Onlychics
- On Your Sleeve
- Oshen Active
- Ogiis
- Olive & Bean
- O Twins Clothing
- Olive and Quin
- Olivia Ann
- Oil And Charcoal
- Oohstock
- Onyx & Ash
- Ocean Luxe
- Ocean vs The World
- One Stop Bow Shop
- Only Bindis
- Oskar-Emil
- OWL Watches
- Optima Watch
- Oniss Watch
- Omax Watches
- Optimum Time
- Olazone
- Oulm Watch
- Odm Watches
- Olmeca
- Orbital Moon Watches
- Optimo Group
- Officina Del Tempo
- Overstock Sunglasses
- Orasin
- Opium Eyewear
- One Point Seven Four
- Out Of Sight
- Ozeano
- Our Little Tribe
- Oovy
- Original Toddler
- Owa Yurika
- Oramai_London
- Oak & Jackal
- Omygeeze