Short answer

• For clothes in Singapore, Zalora is usually the better choice for fashion: bigger curated selection of brands, fashion-first features and a more generous return window. (zalora.sg)
• Lazada is fine when you want cheaper, wide-ranging bargains or multi-category shopping, but you need to be more careful about seller reliability, product authenticity and shorter return windows (use LazMall/official stores). (lazada.sg)

Why (quick bullets)

• Zalora is a fashion-dedicated marketplace with many local & international brands and size/fit info aimed at clothing shoppers. This makes it easier to find garments, compare brands and rely on curated listings. (zalora.sg)
• Zalora’s return/exchange policies (most clothing items: up to 30 days, with clear return options) are friendlier for apparel where fit is uncertain. (support-sg.zalora-ops.com)
• Lazada is a general marketplace (tons of sellers) — you’ll find lower prices and more variety, but many listings are third‑party and the standard non-LazMall return window is shorter, so “buyer beware” applies. (lazada.sg)
• User reviews show occasional problems on Lazada with seller mistakes or returns — checking seller ratings and LazMall/official stores reduces risk. (sitejabber.com)

How I’d choose, depending on what you care about

• Prioritize fit, brand selection, easy returns: shop Zalora. (zalora.sg)
• Prioritize lowest price / one-stop shopping for non-fashion items too: check Lazada but buy from LazMall or high-rated sellers and confirm the return window before you buy. (lazada.sg)

Practical tips (to save time & risk)

• On Lazada: filter for “LazMall” or the brand’s official store; read seller ratings and recent reviews; check the return window per listing. (lazada.sg)
• On Zalora: look for items marked non-returnable on the product page, and consider Zalora VIP if you order frequently (faster/free delivery options). (zalora.sg)
• Always use the size charts, read multiple reviews (photos/helpful comments), and save screenshots of product pages and order confirmations in case of disputes.

If you want, tell me: budget, preferred brands or whether you care about free returns — I can recommend which platform and specific filters/stores to use.