Self Locking Book Mailers
Self locking book mailer
Upgrade your dispatch process with reliable, professional postal mailers designed specifically for direct-to-door delivery.
Trojan self-locking die-cut cardboard boxes provide dependable edge-to-edge protection without bulky over-packaging.
Convenient Letterbox Fit
Nobody likes missed delivery cards. The slim profile of the Small and Medium boxes is engineered to drop through standard UK front door letterboxes, giving your customers frictionless delivery on arrival.
For bulkier orders, multiple books, or chunkier items, the 50 mm Large box offers generous extra depth.
Internal Dimensions (L x W x D)
C5 Small: 242 × 175 × 21 mm (Ideal for paperbacks, A5 stationery, single comic issues, phone cases, and small gifts)
C4 Medium: 324 × 230 × 21 mm (Fits A4 prints, comic runs with backing boards, graphic novels, and slimline tablets)
C4 Deep Large: 322 × 229 × 50 mm (Extra 50 mm depth for thick hardback books, multi-pack orders, and deeper retail products)
Fast Assembly & Clean Presentation
Featuring precision pre-scored crease lines and an integrated half-circle locking tab.
Simply fold the sides, seat the flap, and slide your items inside.
Clean White and rustic Kraft boards accept adhesive labels, thermal courier stickers, and custom ink stamps effortlessly.
Trojan self-locking die-cut cardboard boxes provide dependable edge-to-edge protection without bulky over-packaging.
Convenient Letterbox Fit
Nobody likes missed delivery cards. The slim profile of the Small and Medium boxes is engineered to drop through standard UK front door letterboxes, giving your customers frictionless delivery on arrival.
For bulkier orders, multiple books, or chunkier items, the 50 mm Large box offers generous extra depth.
Internal Dimensions (L x W x D)
C5 Small: 242 × 175 × 21 mm (Ideal for paperbacks, A5 stationery, single comic issues, phone cases, and small gifts)
C4 Medium: 324 × 230 × 21 mm (Fits A4 prints, comic runs with backing boards, graphic novels, and slimline tablets)
C4 Deep Large: 322 × 229 × 50 mm (Extra 50 mm depth for thick hardback books, multi-pack orders, and deeper retail products)
Fast Assembly & Clean Presentation
Featuring precision pre-scored crease lines and an integrated half-circle locking tab.
Simply fold the sides, seat the flap, and slide your items inside.
Clean White and rustic Kraft boards accept adhesive labels, thermal courier stickers, and custom ink stamps effortlessly.
£9.18 - £18.21
Description
Dimensions
About this item
LETTERBOX FRIENDLY DELIVERY: Designed to slide smoothly through standard UK letterboxes. The slim profile ensures hassle-free, first-time delivery without customers needing to be home or parcels left out in the rain.
SECURE DIE-CUT LOCK TAB: Features an interlocking half-circle tab that snaps firmly shut. Folds together in seconds with no glue or mess required, creating a neat, rigid closure for e-commerce shipping.
PURPOSE-MADE FOR SLIM ITEMS: Low-profile depth secures books, comic books, graphic novels, documents, picture frames, and slimline tablets snugly without rattling or requiring excess void fill.
DURABLE & FULLY RECYCLABLE: Manufactured from sturdy, 100% recyclable, eco-conscious packaging with a clean finish suited for thermal shipping labels or stamps.
SUPPLIED FLAT-PACKED: Delivered flat to save valuable workshop, retail, or home storage space. Available in crisp White or natural Kraft.
Upgrade Your Dispatch Process with Reliable Postal Mailers
Reliable, professional postal mailers designed specifically for direct-to-door delivery.
Trojan self-locking die-cut cardboard boxes provide dependable edge-to-edge protection without bulky over-packaging.
LETTERBOX FIT
Nobody likes missed delivery cards. The slim profile of the Small and Medium boxes is engineered to fit through standard UK front door letterboxes, giving your customers a smooth, hassle-free delivery experience.
For bulkier orders, multiple books, or chunkier items, the 50 mm Large box offers generous extra depth.
LETTERBOX FRIENDLY DELIVERY: Designed to slide smoothly through standard UK letterboxes. The slim profile ensures hassle-free, first-time delivery without customers needing to be home or parcels left out in the rain.
SECURE DIE-CUT LOCK TAB: Features an interlocking half-circle tab that snaps firmly shut. Folds together in seconds with no glue or mess required, creating a neat, rigid closure for e-commerce shipping.
PURPOSE-MADE FOR SLIM ITEMS: Low-profile depth secures books, comic books, graphic novels, documents, picture frames, and slimline tablets snugly without rattling or requiring excess void fill.
DURABLE & FULLY RECYCLABLE: Manufactured from sturdy, 100% recyclable, eco-conscious packaging with a clean finish suited for thermal shipping labels or stamps.
SUPPLIED FLAT-PACKED: Delivered flat to save valuable workshop, retail, or home storage space. Available in crisp White or natural Kraft.
Upgrade Your Dispatch Process with Reliable Postal Mailers
Reliable, professional postal mailers designed specifically for direct-to-door delivery.
Trojan self-locking die-cut cardboard boxes provide dependable edge-to-edge protection without bulky over-packaging.
LETTERBOX FIT
Nobody likes missed delivery cards. The slim profile of the Small and Medium boxes is engineered to fit through standard UK front door letterboxes, giving your customers a smooth, hassle-free delivery experience.
For bulkier orders, multiple books, or chunkier items, the 50 mm Large box offers generous extra depth.
| Code | Dimensions mm (LxWxH) | Size Guide | Colour | Pack Size | 1-4 Packs | 5-9 Packs | 10-19 Packs | 20+ Packs | Qty | |
|---|---|---|---|---|---|---|---|---|---|---|
| 9417_25 | 242 x 175 x 21mm | Self Locking C5 | Kraft | 25 | £10.28 | £9.97 | £9.67 | £9.18 | ||
| 9417_25_W | 242 x 175 x 21mm | Self Locking C5 | White | 25 | £10.28 | £9.97 | £9.67 | £9.18 | ||
| 9418_25 | 324 × 230 × 21mm | Self Locking C4 | Kraft | 25 | £15.83 | £15.35 | £14.89 | £14.14 | ||
| 9418_25_W | 324 × 230 × 21mm | Self Locking C4 | White | 25 | £15.83 | £15.35 | £14.89 | £14.14 | ||
| 9419_25 | 322 × 229 × 50mm | Self Locking C4DEEP | Kraft | 25 | £18.21 | £17.66 | £17.13 | £16.27 | ||
| 9419_25_W | 322 × 229 × 50mm | Self Locking C4DEEP | White | 25 | £18.21 | £17.66 | £17.13 | £16.27 |
6 variations
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Dimensions mm (LxWxH)
Size Guide
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1-4 Packs
5-9 Packs
10-19 Packs
20+ Packs
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