What is the difference between E-Flute and B-Flute for custom mailer boxes?

E-Flute (approx. 1.5mm thick, 90 flutes/ft) provides an ultra-flat printing surface ideal for photorealistic flexo and digital graphics with zero flute washboarding. It is optimal for shipments under 2.5 kg. B-Flute (approx. 3.0mm thick, 47 flutes/ft) offers enhanced puncture and column compression resistance, ideal for heavier goods up to 10 kg.

Do you provide custom vector CAD dielines before ordering?

Yes. Submit your interior product dimensions, and our engineering desk will send a production-ready 1:1 parametric CAD dieline (PDF and DXF format) within 24 hours with exact folding clearances.

What are your minimum order quantities (MOQ) for pilot test runs?

We support high-growth DTC brands with pilot production runs starting at 500 units utilizing CNC digital plotting and short-run digital presses with zero tooling fees, scalable to 500,000 units on automated die-cutters.

Custom Corrugated Mailer Boxes (E/B Flute)

Direct Manufacturing Catalog

50 Standard Physical Corrugated Shipping & Mailer Boxes Specifications

Select standard pre-tooled sizes below to waive initial knife-die tooling charges, or request custom parametric dielines adapted to your exact retail dimensions.

SKU	Specification Name	Dimensions (L × W × H)	Material / Caliper	Crush Strength	Est. CBM	Pilot MOQ	Action
NK-MB-01	Series 01 Corrugated Mailer Box (146x104x35mm)	`146 x 104 x 35 mm (5.7 x 4.1 x 1.4 in)`	250gsm Virgin Kraft / 120gsm Fluting / 250gsm Testliner	34 ECT	0.5314 m3	1,000 pcs	Quote SKU
NK-MB-02	Series 02 Corrugated Mailer Box (152x108x40mm)	`152 x 108 x 40 mm (6.0 x 4.3 x 1.6 in)`	250gsm Virgin Kraft / 120gsm Fluting / 250gsm Testliner	36 ECT	0.6566 m3	500 pcs	Quote SKU
NK-MB-03	Series 03 Corrugated Mailer Box (158x112x45mm)	`158 x 112 x 45 mm (6.2 x 4.4 x 1.8 in)`	250gsm Virgin Kraft / 120gsm Fluting / 250gsm Testliner	38 ECT	0.7963 m3	1,000 pcs	Quote SKU
NK-MB-04	Series 04 Corrugated Mailer Box (164x116x50mm)	`164 x 116 x 50 mm (6.5 x 4.6 x 2.0 in)`	250gsm Virgin Kraft / 120gsm Fluting / 250gsm Testliner	40 ECT	0.9512 m3	500 pcs	Quote SKU
NK-MB-05	Series 05 Corrugated Mailer Box (170x120x55mm)	`170 x 120 x 55 mm (6.7 x 4.7 x 2.2 in)`	250gsm Virgin Kraft / 120gsm Fluting / 250gsm Testliner	32 ECT	1.122 m3	1,000 pcs	Quote SKU
NK-MB-06	Series 06 Corrugated Mailer Box (176x124x60mm)	`176 x 124 x 60 mm (6.9 x 4.9 x 2.4 in)`	250gsm Virgin Kraft / 120gsm Fluting / 250gsm Testliner	34 ECT	1.3094 m3	500 pcs	Quote SKU
NK-MB-07	Series 07 Corrugated Mailer Box (182x128x65mm)	`182 x 128 x 65 mm (7.2 x 5.0 x 2.6 in)`	250gsm Virgin Kraft / 120gsm Fluting / 250gsm Testliner	36 ECT	1.5142 m3	1,000 pcs	Quote SKU
NK-MB-08	Series 08 Corrugated Mailer Box (188x132x70mm)	`188 x 132 x 70 mm (7.4 x 5.2 x 2.8 in)`	250gsm Virgin Kraft / 120gsm Fluting / 250gsm Testliner	38 ECT	1.7371 m3	500 pcs	Quote SKU
NK-MB-09	Series 09 Corrugated Mailer Box (194x136x75mm)	`194 x 136 x 75 mm (7.6 x 5.4 x 3.0 in)`	250gsm Virgin Kraft / 120gsm Fluting / 250gsm Testliner	40 ECT	1.9788 m3	1,000 pcs	Quote SKU
NK-MB-10	Series 10 Corrugated Mailer Box (200x140x80mm)	`200 x 140 x 80 mm (7.9 x 5.5 x 3.1 in)`	250gsm Virgin Kraft / 120gsm Fluting / 250gsm Testliner	32 ECT	2.24 m3	500 pcs	Quote SKU
NK-MB-11	Series 11 Corrugated Mailer Box (206x144x85mm)	`206 x 144 x 85 mm (8.1 x 5.7 x 3.3 in)`	250gsm Virgin Kraft / 120gsm Fluting / 250gsm Testliner	34 ECT	2.5214 m3	1,000 pcs	Quote SKU
NK-MB-12	Series 12 Corrugated Mailer Box (212x148x30mm)	`212 x 148 x 30 mm (8.3 x 5.8 x 1.2 in)`	250gsm Virgin Kraft / 120gsm Fluting / 250gsm Testliner	36 ECT	0.9413 m3	500 pcs	Quote SKU
NK-MB-13	Series 13 Corrugated Mailer Box (218x152x35mm)	`218 x 152 x 35 mm (8.6 x 6.0 x 1.4 in)`	250gsm Virgin Kraft / 120gsm Fluting / 250gsm Testliner	38 ECT	1.1598 m3	1,000 pcs	Quote SKU
NK-MB-14	Series 14 Corrugated Mailer Box (224x156x40mm)	`224 x 156 x 40 mm (8.8 x 6.1 x 1.6 in)`	250gsm Virgin Kraft / 120gsm Fluting / 250gsm Testliner	40 ECT	1.3978 m3	500 pcs	Quote SKU
NK-MB-15	Series 15 Corrugated Mailer Box (230x160x45mm)	`230 x 160 x 45 mm (9.1 x 6.3 x 1.8 in)`	250gsm Virgin Kraft / 120gsm Fluting / 250gsm Testliner	32 ECT	1.656 m3	1,000 pcs	Quote SKU
NK-MB-16	Series 16 Corrugated Mailer Box (236x164x50mm)	`236 x 164 x 50 mm (9.3 x 6.5 x 2.0 in)`	250gsm Virgin Kraft / 120gsm Fluting / 250gsm Testliner	34 ECT	1.9352 m3	500 pcs	Quote SKU
NK-MB-17	Series 17 Corrugated Mailer Box (242x168x55mm)	`242 x 168 x 55 mm (9.5 x 6.6 x 2.2 in)`	250gsm Virgin Kraft / 120gsm Fluting / 250gsm Testliner	36 ECT	2.2361 m3	1,000 pcs	Quote SKU
NK-MB-18	Series 18 Corrugated Mailer Box (248x172x60mm)	`248 x 172 x 60 mm (9.8 x 6.8 x 2.4 in)`	250gsm Virgin Kraft / 120gsm Fluting / 250gsm Testliner	38 ECT	2.5594 m3	500 pcs	Quote SKU
NK-MB-19	Series 19 Corrugated Mailer Box (254x176x65mm)	`254 x 176 x 65 mm (10.0 x 6.9 x 2.6 in)`	250gsm Virgin Kraft / 120gsm Fluting / 250gsm Testliner	40 ECT	2.9058 m3	1,000 pcs	Quote SKU
NK-MB-20	Series 20 Corrugated Mailer Box (260x180x70mm)	`260 x 180 x 70 mm (10.2 x 7.1 x 2.8 in)`	250gsm Virgin Kraft / 120gsm Fluting / 250gsm Testliner	32 ECT	3.276 m3	500 pcs	Quote SKU
NK-MB-21	Series 21 Corrugated Mailer Box (266x184x75mm)	`266 x 184 x 75 mm (10.5 x 7.2 x 3.0 in)`	250gsm Virgin Kraft / 120gsm Fluting / 250gsm Testliner	34 ECT	3.6708 m3	1,000 pcs	Quote SKU
NK-MB-22	Series 22 Corrugated Mailer Box (272x188x80mm)	`272 x 188 x 80 mm (10.7 x 7.4 x 3.1 in)`	250gsm Virgin Kraft / 120gsm Fluting / 250gsm Testliner	36 ECT	4.0909 m3	500 pcs	Quote SKU
NK-MB-23	Series 23 Corrugated Mailer Box (278x192x85mm)	`278 x 192 x 85 mm (10.9 x 7.6 x 3.3 in)`	250gsm Virgin Kraft / 120gsm Fluting / 250gsm Testliner	38 ECT	4.537 m3	1,000 pcs	Quote SKU
NK-MB-24	Series 24 Corrugated Mailer Box (284x196x30mm)	`284 x 196 x 30 mm (11.2 x 7.7 x 1.2 in)`	250gsm Virgin Kraft / 120gsm Fluting / 250gsm Testliner	40 ECT	1.6699 m3	500 pcs	Quote SKU
NK-MB-25	Series 25 Corrugated Mailer Box (290x200x35mm)	`290 x 200 x 35 mm (11.4 x 7.9 x 1.4 in)`	250gsm Virgin Kraft / 120gsm Fluting / 250gsm Testliner	32 ECT	2.03 m3	1,000 pcs	Quote SKU
NK-MB-26	Series 26 Corrugated Mailer Box (296x204x40mm)	`296 x 204 x 40 mm (11.7 x 8.0 x 1.6 in)`	250gsm Virgin Kraft / 120gsm Fluting / 250gsm Testliner	34 ECT	2.4154 m3	500 pcs	Quote SKU
NK-MB-27	Series 27 Corrugated Mailer Box (302x208x45mm)	`302 x 208 x 45 mm (11.9 x 8.2 x 1.8 in)`	250gsm Virgin Kraft / 120gsm Fluting / 250gsm Testliner	36 ECT	2.8267 m3	1,000 pcs	Quote SKU
NK-MB-28	Series 28 Corrugated Mailer Box (308x212x50mm)	`308 x 212 x 50 mm (12.1 x 8.3 x 2.0 in)`	250gsm Virgin Kraft / 120gsm Fluting / 250gsm Testliner	38 ECT	3.2648 m3	500 pcs	Quote SKU
NK-MB-29	Series 29 Corrugated Mailer Box (314x216x55mm)	`314 x 216 x 55 mm (12.4 x 8.5 x 2.2 in)`	250gsm Virgin Kraft / 120gsm Fluting / 250gsm Testliner	40 ECT	3.7303 m3	1,000 pcs	Quote SKU
NK-MB-30	Series 30 Corrugated Mailer Box (320x220x60mm)	`320 x 220 x 60 mm (12.6 x 8.7 x 2.4 in)`	250gsm Virgin Kraft / 120gsm Fluting / 250gsm Testliner	32 ECT	4.224 m3	500 pcs	Quote SKU
NK-MB-31	Series 31 Corrugated Mailer Box (326x224x65mm)	`326 x 224 x 65 mm (12.8 x 8.8 x 2.6 in)`	250gsm Virgin Kraft / 120gsm Fluting / 250gsm Testliner	34 ECT	4.7466 m3	1,000 pcs	Quote SKU
NK-MB-32	Series 32 Corrugated Mailer Box (332x228x70mm)	`332 x 228 x 70 mm (13.1 x 9.0 x 2.8 in)`	250gsm Virgin Kraft / 120gsm Fluting / 250gsm Testliner	36 ECT	5.2987 m3	500 pcs	Quote SKU
NK-MB-33	Series 33 Corrugated Mailer Box (338x232x75mm)	`338 x 232 x 75 mm (13.3 x 9.1 x 3.0 in)`	250gsm Virgin Kraft / 120gsm Fluting / 250gsm Testliner	38 ECT	5.8812 m3	1,000 pcs	Quote SKU
NK-MB-34	Series 34 Corrugated Mailer Box (344x236x80mm)	`344 x 236 x 80 mm (13.5 x 9.3 x 3.1 in)`	250gsm Virgin Kraft / 120gsm Fluting / 250gsm Testliner	40 ECT	6.4947 m3	500 pcs	Quote SKU
NK-MB-35	Series 35 Corrugated Mailer Box (350x240x85mm)	`350 x 240 x 85 mm (13.8 x 9.4 x 3.3 in)`	250gsm Virgin Kraft / 120gsm Fluting / 250gsm Testliner	32 ECT	7.14 m3	1,000 pcs	Quote SKU
NK-MB-36	Series 36 Corrugated Mailer Box (356x244x30mm)	`356 x 244 x 30 mm (14.0 x 9.6 x 1.2 in)`	250gsm Virgin Kraft / 120gsm Fluting / 250gsm Testliner	34 ECT	2.6059 m3	500 pcs	Quote SKU
NK-MB-37	Series 37 Corrugated Mailer Box (362x248x35mm)	`362 x 248 x 35 mm (14.3 x 9.8 x 1.4 in)`	250gsm Virgin Kraft / 120gsm Fluting / 250gsm Testliner	36 ECT	3.1422 m3	1,000 pcs	Quote SKU
NK-MB-38	Series 38 Corrugated Mailer Box (368x252x40mm)	`368 x 252 x 40 mm (14.5 x 9.9 x 1.6 in)`	250gsm Virgin Kraft / 120gsm Fluting / 250gsm Testliner	38 ECT	3.7094 m3	500 pcs	Quote SKU
NK-MB-39	Series 39 Corrugated Mailer Box (374x256x45mm)	`374 x 256 x 45 mm (14.7 x 10.1 x 1.8 in)`	250gsm Virgin Kraft / 120gsm Fluting / 250gsm Testliner	40 ECT	4.3085 m3	1,000 pcs	Quote SKU
NK-MB-40	Series 40 Corrugated Mailer Box (380x260x50mm)	`380 x 260 x 50 mm (15.0 x 10.2 x 2.0 in)`	250gsm Virgin Kraft / 120gsm Fluting / 250gsm Testliner	32 ECT	4.94 m3	500 pcs	Quote SKU
NK-MB-41	Series 41 Corrugated Mailer Box (386x264x55mm)	`386 x 264 x 55 mm (15.2 x 10.4 x 2.2 in)`	250gsm Virgin Kraft / 120gsm Fluting / 250gsm Testliner	34 ECT	5.6047 m3	1,000 pcs	Quote SKU
NK-MB-42	Series 42 Corrugated Mailer Box (392x268x60mm)	`392 x 268 x 60 mm (15.4 x 10.6 x 2.4 in)`	250gsm Virgin Kraft / 120gsm Fluting / 250gsm Testliner	36 ECT	6.3034 m3	500 pcs	Quote SKU
NK-MB-43	Series 43 Corrugated Mailer Box (398x272x65mm)	`398 x 272 x 65 mm (15.7 x 10.7 x 2.6 in)`	250gsm Virgin Kraft / 120gsm Fluting / 250gsm Testliner	38 ECT	7.0366 m3	1,000 pcs	Quote SKU
NK-MB-44	Series 44 Corrugated Mailer Box (404x276x70mm)	`404 x 276 x 70 mm (15.9 x 10.9 x 2.8 in)`	250gsm Virgin Kraft / 120gsm Fluting / 250gsm Testliner	40 ECT	7.8053 m3	500 pcs	Quote SKU
NK-MB-45	Series 45 Corrugated Mailer Box (410x280x75mm)	`410 x 280 x 75 mm (16.1 x 11.0 x 3.0 in)`	250gsm Virgin Kraft / 120gsm Fluting / 250gsm Testliner	32 ECT	8.61 m3	1,000 pcs	Quote SKU
NK-MB-46	Series 46 Corrugated Mailer Box (416x284x80mm)	`416 x 284 x 80 mm (16.4 x 11.2 x 3.1 in)`	250gsm Virgin Kraft / 120gsm Fluting / 250gsm Testliner	34 ECT	9.4515 m3	500 pcs	Quote SKU
NK-MB-47	Series 47 Corrugated Mailer Box (422x288x85mm)	`422 x 288 x 85 mm (16.6 x 11.3 x 3.3 in)`	250gsm Virgin Kraft / 120gsm Fluting / 250gsm Testliner	36 ECT	10.3306 m3	1,000 pcs	Quote SKU
NK-MB-48	Series 48 Corrugated Mailer Box (428x292x30mm)	`428 x 292 x 30 mm (16.9 x 11.5 x 1.2 in)`	250gsm Virgin Kraft / 120gsm Fluting / 250gsm Testliner	38 ECT	3.7493 m3	500 pcs	Quote SKU
NK-MB-49	Series 49 Corrugated Mailer Box (434x296x35mm)	`434 x 296 x 35 mm (17.1 x 11.7 x 1.4 in)`	250gsm Virgin Kraft / 120gsm Fluting / 250gsm Testliner	40 ECT	4.4962 m3	1,000 pcs	Quote SKU
NK-MB-50	Series 50 Corrugated Mailer Box (440x300x40mm)	`440 x 300 x 40 mm (17.3 x 11.8 x 1.6 in)`	250gsm Virgin Kraft / 120gsm Fluting / 250gsm Testliner	32 ECT	5.28 m3	500 pcs	Quote SKU

• All 50 specifications above are actively manufactured in our 35,000 m² Jinjiang facility under FSC-C158941 chain of custody. Custom CMYK + Pantone branding available on all runs.

Engineered Corrugated Mailer Boxes for Global DTC Brands

50 Standard Physical Corrugated Shipping & Mailer Boxes Specifications

Technical & Procurement FAQ

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