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name: 50-asset-resize description: "Dung khi da co MOT master design va can ra du kich thuoc cho tat ca kenh — bang kich thuoc chuan 2025-2026 cho feed, story, reel, cover, placement ads; 3 cach xu ly scale-crop, re-compose, rebuild; quy tac safe zone va cach dat ten file. Kich hoat khi user nhac 'resize asset', 'du kich thuoc', 'adapt kich thuoc', 'bang kich thuoc chuan', 'safe zone', 'anh bi cat mat chu tren story', 'mot anh dang duoc may cho'. Khong dung cho — thiet ke moi tu concept thi dung skill 42-brief-hinh-anh; asset gap khi campaign dang chay thi dung skill 48-quick-visual-brief; liet ke toan bo asset cua campaign thi dung skill 41-campaign-asset-list." metadata: version: 1.0.1 category: operations license: MIT triggers:

• "resize asset"
• "resize design"
• "du kich thuoc"
• "adapt kich thuoc"
• "bang kich thuoc chuan"
• "safe zone"
• "repurpose design" output: "File .md — resize map theo kenh voi strategy va priority tung kich thuoc, quy tac re-compose, safe zone, naming + folder, checklist final. Designer resize xong khong can hoi lai." related:
• 41-campaign-asset-list
• 42-brief-hinh-anh
• 48-quick-visual-brief
• 46-brand-guideline
• 21-audit-ads-performance

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Asset Resize

Resize khong phai keo to keo nho — moi ti le can re-compose de hierarchy van dung. 1 master design tot → 10+ variants: day la khau tiet kiem thoi gian nhieu nhat cua design production, va la viec dau tien sau campaign (repurpose winner o D+2).

Thu thap thong tin

Doc asset list (41-campaign-asset-list) neu co. Neu thieu, hoi toi da 4 cau:

1. Master design la gi? Link file goc (Canva/Figma) + kich thuoc va kenh ban dau?
2. Can resize ra kenh / kich thuoc nao? Liet ke het — hay lay theo asset list?
3. Element nao khong duoc mat? Text, CTA, logo, khuon mat, san pham — co element nao gan canh khong?
4. Duoc phep crop noi dung khong, hay phai giu nguyen toan bo?

Nguyen tac

1. Luon resize tu file goc (master) — khong resize tu file da resize (chat luong giam dan).
2. Element quan trong khong duoc crop o bat ky kich thuoc nao — focal point, CTA, logo phai con nguyen.
3. Moi ratio can chien luoc rieng — khong ap 1 cach cho tat ca.
4. Khong giu du noi dung sau resize → bao Leader quyet dinh bo element nao, khong tu quyet.
5. Repurpose winner ngay sau campaign (D+2) — de lau mat context.
6. Cap nhat trang thai vao asset list sau moi kich thuoc xong.

Quy trinh

Buoc 1 — Phan tich master

Xac dinh: focal point la gi; safe zone cua tung element (text, CTA, logo cach canh bao nhieu); dieu gi CO THE crop (background, texture) va KHONG DUOC crop (message, khuon mat, san pham, CTA).

Buoc 2 — Chon strategy cho tung kich thuoc dich

Strategy	Khi nao dung	Cach lam
Scale & Crop	Ratio gan nhau (1:1 → 4:5, 16:9 → 1.91:1)	Giu nguyen layout, crop bot background
Re-compose	Ratio khac vua (1:1 → 16:9, landscape → cover)	Dich chuyen element de fit ratio moi, giu hierarchy
Rebuild	Ratio khac han (1:1 → 9:16, feed → email)	Lam lai tu dau tren canvas moi, giu concept + mau + copy

Buoc 3 — Resize theo thu tu uu tien

Lam kich thuoc kenh chinh truoc (thuong Feed 1:1), sau do den cac kich thuoc con lai theo priority trong resize map.

Buoc 4 — Kiem tra, dat ten, upload, update

Check tung file theo final checklist → dat ten dung convention → upload dung subfolder → update trang thai asset list.

Bang kich thuoc chuan 2025-2026

Social media

Loai	Kich thuoc	Ti le	Kenh	Ghi chu
Feed post vuong	1080x1080px	1:1	Facebook, Instagram	Kich thuoc lam truoc tien
Feed post doc	1080x1350px	4:5	Instagram, Facebook	Chiem nhieu man hinh hon tren mobile
Story / Reels	1080x1920px	9:16	FB/IG Story, Reels	Safe zone 250px top/bottom
TikTok video/thumbnail	1080x1920px	9:16	TikTok	Safe zone 150px top / 300px bottom
Facebook cover	820x312px	~2.6:1	FB Page	Mobile crop 2 ben — de noi dung o giua
LinkedIn post	1200x627px	~1.91:1	LinkedIn
YouTube thumbnail	1280x720px	16:9	YouTube

Ads (Meta)

Loai	Kich thuoc	Ghi chu
Feed ads	1080x1080px	Dung cho ca FB + IG
Story ads	1080x1920px	Noi dung cach mep ~14%
Carousel	1080x1080px	Toi thieu 2, toi da 10 card
Link post banner	1200x628px

Email / Zalo / Website

Loai	Kich thuoc	Ti le	Strategy thuong dung
Email header	600x200px	3:1	Rebuild
Email hero	600x400px	3:2	Scale & Crop
Zalo OA cover	1200x500px	12:5	Scale & Crop
Website hero desktop	1440x600px	2.4:1	Re-compose
Website hero mobile	375x300px	5:4	Rebuild

Tai lieu

Loai	Kich thuoc	Dung khi
Slide deck 16:9	1920x1080px	Presentation, pitch
A4 doc / ngang	210x297mm / 297x210mm	Report, proposal in

Quy tac re-compose

Landscape / vuong → doc (→ 9:16):

• Logo: giu vi tri theo brand guideline (thuong bottom-right)
• Headline: chuyen len top 1/3
• CTA: luon o bottom 1/3 nhung tren safe zone
• Safe zone story/reels: 250px top/bottom; TikTok: 150px top / 300px bottom

Vuong → email (600px):

• Tang font size neu text qua nho o width moi
• Don gian hoa visual — bot element phu
• CTA button toi thieu 44x44px

→ cover (FB/Zalo):

• Noi dung chinh don vao vung giua — 2 ben se bi crop tren mobile
• Khong dat text sat mep

Naming va folder

• Ten file: [Campaign]_[Kenh]_[KichThuoc]_[Version]_[Status].jpg
• Vi du: KhoaHocQ3_FB_1080x1080_v1_APPROVED.jpg
• Folder:

/[Brand]/Campaigns/[TenCampaign]/Assets/Final/
  Facebook/  TikTok/  Email/  Zalo/  Website/  Archive/

Cau truc ket qua

Ten file: asset-resize-[campaign]-[YYYYMMDD].md

# Resize Map — [Ten campaign]

## Master design
| Hang muc | Chi tiet |
|----------|----------|
| Master file | [link goc] |
| Kich thuoc goc | |
| Focal point | |
| Element khong duoc mat | |

## Resize map
| Kich thuoc | Ti le | Kenh / dung cho | Strategy | Priority | Trang thai |
|-----------|-------|-----------------|----------|----------|------------|
| 1080x1080px | 1:1 | FB/IG Feed + Ads | Scale & Crop | Cao | |
| 1080x1350px | 4:5 | IG Feed doc | Re-compose | Cao | |
| 1080x1920px | 9:16 | Story / Reels / TikTok | Rebuild | Cao | |
| 1200x628px | 1.91:1 | Link banner | Scale & Crop | TB | |
| 600x200px | 3:1 | Email header | Rebuild | TB | |
| [them theo asset list] | | | | | |

## Ghi chu re-compose tung kich thuoc
- [kich thuoc]: [element nao doi cho, crop gi, luu y safe zone]

Final checklist

• Tat ca kich thuoc trong resize map da xong
• Khong co anh bi meo (khong stretch — chi scale giu ti le)
• Text khong bi crop — safe zone tung kenh dam bao
• Logo hien dien va dung version o moi kich thuoc
• CTA van doc duoc o kich thuoc nho nhat
• Font size van doc duoc tren mobile sau resize (>= 14px hien thi)
• File dat ten dung convention, dung status tag
• Upload dung subfolder theo kenh
• Trang thai da update trong asset list

Lien ket skill

• 41-campaign-asset-list: danh sach kich thuoc can lam lay tu asset list; resize xong update nguoc lai.
• 42-brief-hinh-anh: master design sinh ra tu brief anh; adapt rules ghi trong brief khi co nhieu size.
• 48-quick-visual-brief: variant thang tu quick brief → resize ra cac kich thuoc con lai.
• 21-audit-ads-performance: xac dinh winner de repurpose sau campaign (D+1 danh dau, D+2 resize).
• 46-brand-guideline: vi tri logo, font toi thieu, spacing khi re-compose.

Checklist chat luong

• Master da phan tich: focal point + element khong duoc mat + vung crop duoc
• Moi kich thuoc dich co strategy ro (Scale & Crop / Re-compose / Rebuild)
• Thu tu uu tien ro — kenh chinh lam truoc
• Safe zone tung kenh ap dung dung bang chuan
• Truong hop khong giu du noi dung da bao Leader quyet
• Resize tu file goc, khong tu file export
• Final checklist chay xong truoc khi bao done