Double‑Core Honeycomb Mailer 12.5x(23+4)cm - 4‑Layer Ultra‑Cushioning for Small Fragile Items - 80+80+80+80 GSM, Biodegradable

This ultra‑small honeycomb mailer features a 4‑layer construction (kraft outer, two layers of honeycomb paper, kraft inner) for double the cushioning of standard mailers. Measuring 12.5 cm wide and 23 cm long (plus 4 cm flap), it is perfect for small, high‑value items like jewelry, USB drives, SD cards, watches, and small electronics. The dual honeycomb core provides exceptional crush resistance and vibration absorption, making it ideal for items that cannot tolerate any shock. Self‑seal adhesive closure included. Made from 100% recycled kraft paper, fully compostable and recyclable.

HUANCHEER's double‑core honeycomb mailers are engineered for the most delicate products. We use a proprietary lamination process that bonds two independent honeycomb layers between kraft sheets, creating a cushioning pad that rivals plastic foam in protection while remaining 100% paper‑based. This size is a favorite among jewelry brands, electronics manufacturers, and pharmacy delivery services. We offer custom printing, custom sizes, and fast turnaround. Protect your smallest treasures with the strongest paper mailer available.

• Size: 12.5 x (23+4) cm - fits jewelry boxes, USB drives, small electronics
• 4-layer structure: kraft / honeycomb / honeycomb / kraft (4×80 GSM)
• Double honeycomb core - superior shock absorption
• Self‑seal adhesive strip - tamper‑evident closure
• 100% recycled brown kraft - biodegradable and recyclable
• Ideal for high‑value small items, gift cards, SD cards
• Custom sizes and logo printing available
• MOQ: 10,000 pieces

• Price: RMB 0.5 per piece
• MOQ: 10,000 pieces
• Payment: T/T, L/C
• Supply ability: 10,000 pieces per week
• Sample: Free (shipping cost applies)
• Lead time: 5-8 work days

• Packing: Carton boxes (high density)
• Delivery: 5-8 work days
• Ports: Shenzhen, Guangzhou
• EXW, FOB, CIF terms
• Air express for sample orders

• Q: How much thicker is the 4‑layer compared to 3‑layer?
  A: Approximately double - about 6-8 mm total thickness.
• Q: Can I use this mailer for shipping a small glass bottle (e.g., perfume sample)?
  A: Yes, the double honeycomb provides excellent cushioning. We recommend sealing the bottle in a secondary bag first.
• Q: Does the extra layer increase shipping weight significantly?
  A: Very little - each mailer weighs only a few grams more than 3‑layer.
• Q: Is the self‑seal strip strong enough for repeated opening?
  A: It is designed for one‑time closure. For reusable packaging, consider a tuck flap.
• Q: Can I get this size in white kraft?
  A: Yes, custom color available (MOQ 10,000).
• Q: What is the recommended weight limit?
  A: Up to 500 g, but the cushioning is suitable for heavier small items if boxed internally.

double honeycomb mailer, 12.5x23cm mini padded envelope, 4-layer crush resistant, jewelry shipping bag, eco SD card mailer, 80+80+80+80 GSM, HUANCHEER