Plywood drawer boxes: which thickness, face and joint for sides and bottoms?

Plywood drawer boxes: what they are made of

For US indoor-panel compliance, 40 CFR 770.10 sets a 0.05 ppm formaldehyde limit for hardwood plywood with veneer or composite cores. For British timber procurement, Great Britain applies its UK Timber Regulations to timber products including furniture.

Plywood drawer boxes are four-sided drawer bodies made from plywood sides, front and back, with a thin plywood bottom captured in a groove. A separate decorative drawer front is screwed on the outside, so the box itself is a working part.

A drawer box has five parts:

Kitchen, bedroom, office and hotel furniture makers all build drawer boxes this way. The plywood decides how the drawer feels: straight runs, tight joints and clean top edges.

What size plywood for drawer boxes?

Use 12 mm plywood for small and light drawers, 15 mm for kitchen drawers and most furniture, and 18 mm only for heavy-duty or very large drawers. Bottoms are 6 mm for most drawers.

Sides and bottoms are usually cut from different panels: a sanded hardwood-faced panel for the sides, and a thin 5-ply panel for the bottom. The plywood thickness guide lists the inch and metric equivalents.

5/8 drawer box material vs 1/2 in: which to choose?

5/8 drawer box material, about 15 mm, is the better choice for kitchen drawers, dovetail joints and wide drawers. 1/2 in, about 12 mm, suits smaller drawers where weight and inside width matter more.

Most undermount runners accept sides up to about 16 mm, so 15 mm works with both side-mount and undermount slides. Check the runner maker’s chart before fixing the thickness.

Birch ply drawers: birch-faced plywood vs Baltic birch

Birch ply drawers are made either from Baltic birch, with birch in every ply, or from birch-faced plywood, with birch face and back veneers over a lighter plantation core. Both make strong drawers; the difference is the edge and the weight.

In Vietnamese grading, birch faces are D+, D and E: D+ is close to European B, D close to BB and E close to CP/C, so D+/D is close to B/BB. Our birch-faced panels use white Styrax or Eucalyptus cores, stitched both across and along the panel, so the drawer edge shows even layers without gaps. The Baltic birch plywood guide covers the all-birch panel.

Why plywood beats MDF and particleboard for drawers

Plywood beats MDF and particleboard for drawers because its cross-laminated veneers hold fasteners near edges, resist sagging and tolerate damp. Drawer boxes are opened thousands of times, and the joints take the strain.

A kitchen drawer is opened several times a day for years, so the joint and the bottom carry far more cycles than any other cabinet part.

The drawer panel: what makes good drawer plywood

A good drawer panel has sanded, defect-free faces on both sides, a solid core with no voids at the edge, even thickness and a flat sheet. Both faces of a drawer side are seen, inside and out.

• Both faces graded. Specify a two-face grade such as A/A or D+/D: the inside face is visible every time the drawer opens.
• Solid core at the edge. The top edge of the side shows every ply; a void there is a visible hole.
• Even thickness. Sanded panels held to ±0.2–0.3 mm keep grooves and joints the same on every part.
• Flat sheets. Our furniture panels are pressed twice, so the core is calibrated before the faces go on and the sheet stays flat.
• Dry. 8–12% moisture at dispatch, so parts do not move after machining.

Poplar faces are a cost-effective alternative for drawers that will be painted or lacquered white, and eucalyptus faces give a denser, harder surface.

Which joints work for plywood drawer boxes?

Rabbet, lock-rabbet, dowel and dovetail joints all work in plywood drawer boxes; the choice depends on the machines in the plant and the look wanted. Plywood holds each of them better than particleboard.

Furniture plants on CNC lines often use dowels or lock rabbets; premium brands show dovetails at the front corners. Any of these needs an even panel thickness, or joints close unevenly from part to part.

How to make plywood drawer boxes: step by step

Make plywood drawer boxes by cutting parts to size, grooving for the bottom, cutting the corner joints, then gluing and squaring the box around the bottom. These steps suit a workshop or a production line, and the same order works for any box size:

1. Size the box from the cabinet opening and the runner maker’s clearances.
2. Cut the parts: two sides, a front and a back from 12 or 15 mm plywood, grain running along the length.
3. Groove the bottom: a 6 mm groove, 6 mm deep, about 12 mm above the bottom edge, on all four parts.
4. Cut the joints: rabbets, dowels, lock rabbets or dovetails at the corners.
5. Sand the edges and break the top edges with a small round-over.
6. Cut the bottom from 6 mm plywood, slightly smaller than the groove-to-groove size.
7. Assemble: glue the corners, slide the bottom into its groove without glue, clamp, and check the diagonals are equal.
8. Finish: lacquer or oil the box before fitting runners.
9. Fit runners and the front, then adjust.

Leaving the bottom unglued lets it move slightly with humidity without cracking the box.

Drawer bottoms: thickness and fixing

A drawer bottom is 6 mm plywood set in a groove for most drawers, and 9 or 12 mm for heavy ones. Plywood bottoms stay flat because each ply crosses the one below.

Our thin plywood from 3 to 5 mm is always 5-ply, which gives a flatter, stiffer bottom than three-ply panels of the same thickness; at 6 mm the ply count is confirmed with the order. Both faces are sanded. See the thin plywood page for faces and sizes.

Exposed edges, edge banding and finish

Exposed plywood edges are a feature of modern drawer boxes: sanded, rounded and lacquered, the even layers show the quality of the panel. Edge banding is used when the drawer must match a coloured cabinet.

• Exposed edge: sand to 180 grit, round the top edge, seal with the same lacquer as the faces.
• Edge banding: a thin wood or PVC strip on the top edge, applied before assembly; see the plywood edge banding guide.
• Finish: a clear water-based lacquer or a UV-cured lacquer line in the furniture plant.

Our panels leave the factory sanded and polished, with both faces UV-ready: prepared to the standard a buyer needs to apply its own UV coating. Plants that run their own lacquer lines get an even surface on both sides of every part.

Sizing drawer boxes to the runners

Size the drawer box from the runner, not only from the opening: each slide type sets its own side clearance and side thickness. Get the runner chart before cutting parts.

For undermount slides, the bottom is set higher in the box so the runner sits underneath; the runner maker gives the exact recess. ### Ready-made drawer box sizes for UK cabinets

UK kitchens are built from 18 mm carcass sides, so ready-made boxes are sized by the external cabinet width. The Baltic birch dovetail boxes sold by Trade Hinges (checked on 21 October 2026) are flat-packed, 12 mm thick in 9 plies of birch, with dovetails at all 4 corners:

Each box is 54 mm narrower than the cabinet: two 18 mm sides plus 9 mm of runner clearance on each side. Specialist makers such as Probox (checked on 21 October 2026) cut birch plywood boxes in 13 or 15 mm sides, lacquered or raw, with drilling for the popular runner types, and say they have 38 years of manufacturing experience.

On the runner side, Blum’s Movento undermount runners are documented for drawer sides of 13 to 16 mm (16 mm for the standard 40 kg class), with inside box width equal to the opening width minus 42 mm; check the current Blum sheet for the part number and for 40 kg or heavier load classes (Blum Movento, read 21 October 2026).

Price is the last check. The Trade Hinges pack is £40.11 ex VAT (£48.13 inc VAT) for one box with a pair of Blum Tandem Blumotion runners and clips, in any of the five widths. That is a ready-to-assemble kit with the runners included, so a cabinet maker who buys plywood by the container prices only the raw part: our furniture and interior plywood starts from US$350/m³ FOB (October 2026), and the saving comes from cutting boxes in house from panels cut to the sizes in the table.

The half sheets and small panels guide helps plan part sizes from standard sheets.

Cut-to-size drawer panels from a plywood mill

Furniture plants in Europe, including Italy, order drawer plywood cut to size from the mill, so the plant only grooves, joins and finishes. Ordering cut-to-size panels saves sawing time and offcut handling.

At Minh Thanh Plywood, a panel is cut into 4, 6 or 8 pieces on order, and cut-to-size panels ship regularly to Italy and other European markets. Pieces keep the face grade, sanding and moisture of the full sheet.

Send your drawer schedule and the runner type; we propose the cut plan that gives the best yield from 1220 × 2440 mm or 1250 × 2500 mm sheets. The custom plywood guide covers sizes, faces and branding.

Packing and container loads for drawer plywood

Drawer plywood ships in packs of one thickness, wrapped and strapped on export pallets; one 40HC holds 1,494 sheets of 12 mm or 1,188 sheets of 15 mm on Styrax core. Bottoms in 6 mm can share the container as a mixed load.

Figures are for 1220 × 2440 mm sheets on Styrax core, 18 packs per 40HC, within the 28,000 kg planning payload. Mixed specifications in one container are made by agreement; a common drawer order pairs 15 mm sides with 6 mm bottoms.

What to write on a drawer plywood order

A drawer plywood order is complete when it states the part, the thickness and tolerance, both face grades, the core, the bond, the cut size and the packing. Use these lines:

For the US, our panels are certified under CARB P2 / TSCA Title VI as ICTT mill no. 23024, under the EPA formaldehyde standards for composite wood products. Production takes 15–45 days after the 30% deposit, and free samples let your plant run a test drawer before ordering. Send your drawer schedule through the cut-to-size plywood page or see birch plywood for face grades; we reply within hours.