Gmarket 대표이미지 for the Korean open-marketplace shelf

Gmarket product image specs inside the Korean open-marketplace cluster

Gmarket (지마켓) is one of Korea's longest-running open marketplaces, founded in 1999 and operated through multiple ownership changes — eBay Korea, Emart (2021), and since 2024 under Qoo10 Inc. alongside Qoo10 Singapore, Qoo10 Japan, and Tmon. Its image spec sits in the Korean open-marketplace looser band, with partner-consensus guidance pointing to 1000×1000 as the recommended size, 600×600 as the practical minimum, and 2 MB as the per-image cap. Accepted formats span JPG, JPEG, PNG, and GIF, with the 1:1 square aspect preferred for the representative image (대표이미지) shown in search and on category landing pages. The seller admin is ESM Plus, a unified portal that also covers Auction (Gmarket's sibling marketplace), so a single image export typically serves both surfaces without retouching. White background is recommended for best search-surface appearance, but the enforcement is commercial rather than policy — non-white backgrounds are tolerated, though they consistently underperform in thumbnail click-through on the Korean mobile shopping feed.

The practical reality for Korean sellers is that Gmarket clusters naturally with 11st and Coupang Marketplace as the open-marketplace tier — same rough pixel guidance, same white-recommended posture, same ghost-mannequin packshot pattern for apparel. The one Korean marketplace that diverges is Coupang Rocket Grow (로켓그로스), which demands a transparent PNG main instead of white, and that is handled by a dedicated Coupang preset. For the Gmarket-and-friends cluster, the 1000×1000 JPEG with pure white main works across the entire open-marketplace family. This preset locks all of the visible constraints in one pass — square canvas, clean white background, under 2 MB, sRGB colour space, no promotional text on the main, no borders or decorative frames, no watermark. The Korean 누끼 (nukki / cut-out) workflow that Coupang drives carries over here for free: the same cut-out used for a Rocket Grow transparent PNG becomes the clean foreground for a Gmarket white main with a background re-applied at export. Qoo10 Inc. ownership since 2024 adds cross-border reach: a Gmarket catalogue is now effectively a Qoo10 SG and Qoo10 JP catalogue with a translation pass.

Why open-marketplace discipline still matters on Gmarket

Gmarket's looser enforcement makes it easy to ship sloppy imagery and still get listed, but the search-surface ranking and mobile thumbnail click-through punish sloppiness quickly. A consistent 1000×1000 white catalogue keeps the ESM Plus moderation layer happy and maintains visual discipline across Gmarket, Auction, and any Qoo10 cross-border surface the same SKU ends up on. The one-tool one-preset approach also collapses the cross-listing workload across Coupang Marketplace, Gmarket, 11st, and Qoo10 into a single export stage — the Coupang Rocket Grow transparent variant is the only separate path, and that lives in the Coupang preset.