cosplay flea market
0% commission campaign
Your beloved costumes —don't let them sleep
Flea market for cosplayers
Free to buy and sell — get started in 30 seconds
Frustrated with general marketplace apps?
Search "cosplay costume" and get only mass-produced results…
"Free size" label tells you nothing about actual fit…
Have to spam tags just to get found…
COSMA solves it all.
Why choose COSMA
Cosplay-specific search
Search by character or series name to find the costume you want instantly. Filter by size, condition, category, and more.
Secure Stripe payments
Powered by Stripe — the global standard for secure payments. Both buyers and sellers are protected, with full support for any issues.
Learn how payments work →
List in 3 minutes
Just take a photo and set a price. No complicated steps. List, sell, and ship — all from your phone.
How it works3
Take photos & list
Snap photos on your phone, enter the series name and size
Wait for a buyer
COSMA connects your item with the right buyer
Ship & done
Once purchased, pack and ship. Earnings are safely received via Stripe
Items you can buy & sell
Pricing
Limited time! Launch campaign
Zero selling fees
* This campaign may end without notice. Sign up now to lock in 0% fees.
Frequently asked questions
Is it free to sign up?+
Yes, completely free. No signup fees or monthly charges.
What can I list?+
Cosplay costumes, wigs, props, shoes, cameras, photography equipment, photobooks, ROMs, and craft materials. See our Listing Guidelines for details.
What payment methods are accepted?+
Credit cards (Visa / Mastercard / American Express) via Stripe's secure payment system.
How do I receive my earnings?+
Through Stripe Connect, earnings are automatically transferred to your registered bank account. Setup takes just a few minutes.
What if there's a problem?+
The COSMA team is here to help. Use the report feature or contact form to reach us.
Is COSMA available in languages other than Japanese?+
Yes! COSMA supports Japanese, English, and Chinese. You can switch languages from the Settings page.
Our vision
COSMA is more than a marketplace. We believe that buying and selling costumes is just the beginning — it's a chance for cosplayers to connect, meet at events and photo shoots, and build a real community together.
アップデート【アップデート】人気のアニメ・ゲーム・Vtuberから衣装を探せるようになりました
検索ページにアニメ・ゲーム・Vtuberのタグセクションを追加しました。原神・ホロライブ・にじさんじなど、いま人気の作品・キャラから衣装を見つけやすくなります。
アップデート【アップデート】フォロー機能を追加しました
気になるレイヤーさんをフォローして、新着出品のプッシュ通知を受け取れるようになりました。
アップデート【アップデート】できること（スキルタグ）機能を追加しました
プロフィールに「できること」を設定できるようになりました。裁縫・造形・撮影など、あなたのスキルをアピールしましょう。
Your cosplay items —
pass them to the next player.
Free to sign up, takes 30 seconds. Get started now.