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B2B Sizing & Engineering Standard

Bed Size & Mattress
Compatibility Guide.

Eliminate costly sizing misfits, assembly complaints, and freight inefficiencies. Compare UK vs. European continental standards, internal clearance tolerances, gas-lift strut force ratings, and 40HQ mixed-container packing ratios.

View Regional Standards
UK & EU Standard Tooling +15mm Engineered Tolerance Mixed Bed + Mattress Loading
Bed frame and mattress dimensional engineering schematic
Standard Factory Gap Spec

Inner Cavity = Nominal Mattress + 10~15mm (W) / +15~20mm (L) for standard bed-linen tuck & smooth gas-lift operation.

UK Standard Fit 135 × 190 cm (Double) 150 × 200 cm King core focus
EU Standard Fit 140 / 160 × 200 cm 180 × 200 cm Grand King option
Slat Gap Distance ≤ 65 mm Optimal for Pocket Spring warranty
Gas Strut Calibration 600N - 1100N Matched to mattress mass & size
Regional Specification Table

Market Sizing & Container Footprint

Standardized tooling dimensions for bed frame inner cavities, matching mattress sizes, and typical 40HQ container quantities.

Market Label Mattress Size (W × L mm) Internal Cavity Spec Gas Lift Strut (N) KD Bed 40HQ Load Roll Mattress 40HQ
Single (3'0") 900 × 1900 mm 915 × 1915 mm 450N - 600N ~220 - 260 sets ~850 - 950 pcs
Small Double (4'0") 1200 × 1900 mm 1215 × 1915 mm 600N - 800N ~170 - 190 sets ~620 - 700 pcs
Double (4'6") UK Hero SKU 1350 × 1900 mm 1365 × 1915 mm 800N - 900N ~140 - 160 sets ~520 - 580 pcs
King (5'0") UK Hero SKU 1500 × 2000 mm 1515 × 2015 mm 900N - 1000N ~120 - 140 sets ~420 - 480 pcs
Super King (6'0") 1800 × 2000 mm 1815 × 2015 mm 1000N - 1200N ~100 - 115 sets ~350 - 390 pcs
Technical Rules for Buyers

Four Critical Rules of Bed & Mattress Compatibility

Sizing compatibility is more than width × length. Overlooking mattress weight, depth allowance, or slat gap distance leads to returns, structural sagging, and failed lift mechanisms.

01 Clearance Rule

Internal Frame Allowance (+10~15mm)

Mattresses expand slightly after unrolling from vacuum packaging. Our bed frame internal cavities are engineered with a calibrated +10mm to +15mm width tolerance and +15mm length tolerance to accommodate fitted sheets and mattress protectors without buckling side rails.

Factory Default: Double UK (1350×1900) inner bed clearance is cut at precisely 1365×1915mm.
02 Proportion Rule

Headboard Cutout vs. Mattress Thickness

A 20cm thin foam mattress leaves an unsightly gap under high headboards, while a 32cm luxury hybrid may conceal headboard stitching details. We provide customized headboard bracket positioning and bottom-rail height options to keep the bottom gap under 50mm.

Target Match: Optimal mattress thickness for our standard line is 22cm - 28cm (9"-11").
03 Gas Lift Rule

Gas Strut Newton Force (N) Matching

Under-powered gas pistons will fail to hold a 45kg pocket spring mattress open, creating safety hazards. Over-powered pistons with a lightweight 18kg foam mattress will resist closing. We map every ottoman frame's Newton rating to the specific mattress density.

Strut Scale: 450N (Light foam Single) up to 1200N (Heavy luxury King hybrid).
04 Support Rule

Slat Distance & Pocket Spring Longevity

Pocket spring coils have individual diameters between 55mm and 65mm. Slat spacing wider than 70mm allows individual coils to slip between slats, leading to mattress sagging. Our curved birch slats and straight plywood bases maintain spacing ≤65mm.

Standard Build: 26-28 sprung birch slats per double frame with reinforced steel center bar.
Container Logistics & Landed Cost

Mix Bed Frames & Mattresses in One 40HQ Container

FOB price means nothing without optimized loading. Because vacuum roll-packed mattresses are dense and heavy while KD upholstered beds are bulkier, our engineering team balances cubic volume (CBM) and weight to maximize every container's payload.

✓
Pure Bed Frame 40HQ: 130 to 160 flat-pack KD upholstered ottoman beds (approx. 0.40-0.50 CBM per bed set).
✓
Pure Roll Mattress 40HQ: 450 to 650 vacuum roll-compressed mattresses (approx. 0.10-0.15 CBM per box).
✓
Balanced Mixed Plan (Optimal Retail Turn): 80 KD Storage Beds + 180 Matching Pocket Spring Mattresses in a single 40HQ shipment.

Standard Packaging Breakdown Export 5-Ply Mail Order Carton

Upholstered Ottoman Bed 2-Box KD Carton System
Box 1: Headboard + Hardware Box 2: Rails + Gas Lift + Slats
Metal Frame Bed 1-Box All-In-One Carton
1 Set = 1 Box High Loading Density (260+ / 40HQ)
Pocket Spring Mattress Vacuum Roll-Packed
1 Mattress = 1 Compact Box E-Commerce Drop-Ship Ready
Drop-testing & ISTA 3A Compliance: Carton corners are protected with reinforced foam edge guards and heavy-duty strapping to minimize courier and transit damages for e-commerce retailers.
Factory Verified Models

Compatible Platforms & Ready Tooling

Curved Double-Cushion Gas Lift Storage Bed LO-03

Curved Double-Cushion Gas Lift Storage Bed

Available Sizes: UK Single / Dbl / King / EU
Production Lead Time: 30 Days Standard · 45 Days Custom
Standard MOQ: 50 Sets
Rounded-Channel Gas Lift Storage Bed LB-151

Rounded-Channel Gas Lift Storage Bed

Available Sizes: UK Single / Dbl / King / EU
Production Lead Time: 30 Days Standard · 45 Days Custom
Standard MOQ: 50 Sets
Extra-Tall Panel Upholstered Bed Frame P-101

Extra-Tall Panel Upholstered Bed Frame

Available Sizes: UK Single / Dbl / King / EU
Production Lead Time: 30 Days Standard · 45 Days Custom
Standard MOQ: 50 Sets
Commercial & Sizing FAQ

Frequently Asked Sizing Questions

Key clarity for importing teams regarding regional tooling differences, custom sizing MOQ, and fire compliance standards.

Need a custom dimension review?

Our engineering team confirms feasibility, CBM, and sample lead time within 1 business day.

Can we use a UK Double mattress (135×190) on an EU Double bed (140×200)? +
We strongly advise against cross-pairing UK Double mattresses with EU Double frames. An EU Double internal frame has a 1415 × 2015mm inner clearance, which leaves an unsightly 65mm width gap and 115mm length gap around a UK Double mattress, exposing the bare slat platform. We build dedicated UK-tooled frames to avoid this issue.
How do you handle mattress firmness and foam density certification? +
Standard foam densities range from 25D, 30D to 35D high-resilience memory foam. For UK orders, all upholstery foam, barrier interliners, and mattress covers comply strictly with the Furniture & Furnishings (Fire) (Safety) Regulations 1988 and BS 7177 low/medium hazard requirements. Certificates are provided with each production batch.
What is the minimum order quantity (MOQ) per size in a mixed container? +
For configurable existing models (adjusting fabric swatch, headboard height, bed leg, or slat type), the typical MOQ is 30 to 50 sets per size/colour, as long as the cumulative order forms a full 20GP or 40HQ container. Complex custom OEM/ODM tooling is quoted on project review.
Are assembly manuals and branding carton labels localized by country? +
Yes. Private-label buyers can supply custom artwork for carton printing, shipping marks, barcode SKUs, and multi-language assembly manuals (English, German, French, etc.). Step-by-step video assembly guides can also be provided for retail customer support.
Specification-Led Sourcing

Lock in Your Market Sizing & Mixed Container Plan

Send your target country, size assortment, and product preferences. We will return an itemized commercial quotation including exact CBM, 40HQ loading quantities, MOQ, and sample timelines.

Factory-direct FOB China export • Standard 30-day lead time • Approved swatch & golden sample sign-off