Short answer: Mainly on large marketplaces plus a few fashion specialists. The top places Malaysians shop for clothes online are:

• Shopee — the dominant general marketplace (huge selection, many local sellers and brands). (www-statista-com.ezproxy.canberra.edu.au)
• Lazada — another major marketplace (LazMall for branded items). (www-statista-com.ezproxy.canberra.edu.au)
• Zalora — the region’s fashion specialist (brands, curated apparel, returns/customer service geared to fashion). (inf.news)
• Shein and other fast‑fashion platforms — popular for low‑cost trendy pieces. (semrush.com)
• TikTok Shop and social‑commerce sellers — growing channel for trendy/viral clothing via videos and livestreams. (bigseller.com)
• Carousell / Mudah — used for preloved/secondhand clothes and marketplace-style peer sales. (tmogroup.asia)

Why these matter: fashion is one of the top e‑commerce categories in Malaysia, and Shopee/Lazada lead overall traffic while Zalora focuses specifically on apparel. (statista.com)

Quick tips when buying clothes online in Malaysia

• Compare prices across Shopee/Lazada/Zalora/Shein because the same items (or similar) often appear on multiple sites.
• Check seller ratings, product reviews and clear size charts before ordering.
• Read each site’s return/exchange policy (especially for fit and sizing).
• Watch big sale events (9.9, 11.11, 12.12 and other flash sales) — that’s when discounts are usually best.

If you want, I can list the best one for a particular style, budget, or age group (e.g., fast fashion vs. branded vs. pre‑owned).