Many overseas buyers focus on box structure and artwork, but overlook paper weight. Paper GSM determines box stiffness, hand‑feel, total production cost and even sea freight weight. For the same box style, low GSM paper leads to flimsy, deformed boxes. Over‑heavy paper brings unnecessary extra expense.
What is paper GSM
GSM means grams per square meter. Higher GSM equals thicker, stiffer paper. For mounted rigid boxes, stiffness depends on both surface paper and grey board thickness, not surface paper alone.
Recommended GSM for common box styles
- Regular color printed carton (cosmetics, small gifts): 250‑350gsm coated art card. Cost‑effective for flat‑ship folded boxes.
- E‑commerce shipping mailer box: B‑flute / E‑flute corrugated board, focuses on shipping protection.
- Rigid gift box, magnetic closure box: Grey board 1000‑1500gsm mounted with 200‑300gsm art paper or special paper.
- Insert leaflet, hang tag: 120‑170gsm paper. Too thick paper will cause bad folding performance.
Common buying pitfalls
- Higher GSM is not always better. Excess‑thick paper may cause cracking on folding creases.
- Export shipping concern: Heavier paper increases unit weight, raising international logistics cost.
- For rigid mounted boxes, confirm grey board thickness instead of only checking outer surface paper.
- Same GSM does not mean same hand‑feel. Art card, kraft paper and special paper perform differently. Physical sample is highly recommended.
Proper paper weight balances box rigidity, premium look and logistics budget. Thicker does not equal better, always match paper choice with your brand positioning.