Here are the top websites to shop luxury fashion in Singapore, grouped by type with a one‑line note for each (links shown as citations):

International luxury multi‑brand retailers (direct shipping to Singapore)

• NET‑A‑PORTER — global luxury retailer with dedicated Singapore/International service and express shipping. (net-a-porter.com)
• Farfetch — marketplace of boutiques (includes Singapore boutiques on the platform); ships internationally. (farfetch.com)
• Mytheresa — Europe‑based luxury specialist; prices shown in SGD and ships to Singapore (duties/taxes shown at checkout). (mytheresa.com)
• SSENSE — curated luxury/streetwear selection; offers international delivery to Singapore. (ssense.com)
• LUISAVIAROMA — Italian luxury e‑tailer (Florence) that ships worldwide including Singapore. (luisaviaroma.com)

Regional / Southeast Asia marketplaces with “luxury” sections

• ZALORA (ZALORA Luxury) — major regional fashion platform with a curated luxury/premium category in Singapore. (support-sg.zalora-ops.com)
• Lazada (LazMall Prestige) and Shopee (Shopee Premium) — big marketplaces that run curated premium/luxury portals for Singapore shoppers. (thepeakmagazine.com.sg)

Pre‑owned / resale (authenticated luxury)

• Vestiaire Collective — leading authenticated pre‑owned luxury marketplace used widely in Singapore. (faq.vestiairecollective.com)
• Reebonz — Singapore‑founded resale/flash‑sale marketplace for luxury items (has a long history in the region; check current status/reviews before buying). (en.wikipedia.org)

Department stores, local boutiques and specialist sellers with online shops

• Takashimaya / Takashimaya SC — major department store in Orchard (many designer boutiques and online shopping info). (takashimayasc.com.sg)
• TANGS — iconic Singapore department store with an online store and mobile app (carries a range of international brands). (apps.apple.com)

Notes & quick tips

• Which to choose depends on what you want: for newest runway-season pieces and editorial curation go Net‑A‑Porter, Mytheresa, Farfetch or LuisaViaRoma; for streetwear and experimental labels try SSENSE; for bargains and regional convenience try Zalora/Lazada/Shopee luxury portals; for authenticated preloved bags and rare finds use Vestiaire Collective. (net-a-porter.com)
• Shipping, duties and delivery times vary widely — check each site’s Singapore shipping page at checkout (some include duties in price; others charge on delivery). Using consolidation/forwarding services is common for items from boutiques that don’t ship directly to Singapore. (mytheresa.com)
• A caution: MatchesFashion (previously a top site) underwent ownership/administration changes in 2023–24, so its availability and service were disrupted — verify its current status before ordering. (sg.fashionnetwork.com)

If you want, I can:

• Narrow this to “best for handbags”, “best for men’s designer streetwear”, or “best for preloved luxury” and give a ranked short list; or
• Check current shipping/duty costs from any one of these sites to Singapore right now.