7/8″ nominal · 21 mm
BB/BB Baltic Birch Plywood
Sanded birch, unfinished
Finished faces: neither side
7/8-Inch Plywood 4×8 Sheets (21 mm)
Shop 21 mm BB/BB Baltic Birch in full 4×8 sheets, with a 15-ply birch core and sanded unfinished faces. View current pricing for your project.
Shop 7/8″ plywood sheets and prices
Nominal size note: This product is sold as 7/8 inch and specified as 21 mm. Those are not exact equivalents: an exact 7/8 inch is 22.225 mm. Confirm actual thickness and tolerance before machining.
Compare 7/8″ plywood sheet prices
Compare every listed option in this thickness by core, surface, finished faces and full-sheet size. Prices come from the exact selected variants.
| Selected sheet | Core / face grade | Surface / finished faces | Full-sheet size | Price per sheet |
|---|---|---|---|---|
| BB/BB Baltic Birch Plywood7/8″ nominal · 21 mm | 15-ply birch core · BB/BB faces | Sanded birch, unfinishedFinished faces: neither side | 4 × 8 ft (1220 × 2440 mm) | $112.90 USDIn stock |
Scroll the table sideways on small screens. Prices are before eligible volume discounts, delivery and tax. Ordering availability is not a promise of immediate pickup; review the selected product for timing and any special-order terms.
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Before volume discounts
Planning estimate only, not a stock reservation, checkout total or pre-order deposit. The estimator includes listed unavailable sheets for comparison. Delivery, tax and any eligible quantity discount are separate.
21 mm Baltic Birch for thicker cabinet and furniture parts
Use the verified 21 mm construction
This BB/BB Baltic Birch option has 15-ply solid birch construction and a 1220 × 2440 mm sheet format. Both faces are sanded and unfinished, with sound patches permitted by the BB/BB face grade.
Match the project to the thicker panel
Choose this material for cabinet components, furniture, shelving, built-ins or CNC parts when your design calls for 21 mm plywood. Check spans, supports, hardware clearances and edge-banding width; thickness alone is not a load rating.
Compare 21 mm with 18 mm before ordering
The listed 21 mm panel is 3 mm thicker than the 18 mm BB/BB option. It requires different joint allowances and may not fit hardware or grooves sized for thinner material. Compare the 3/4-inch collection when your plan calls for 18 mm parts.
Compare the full plywood thickness range
Need a different thickness or finish? This comparison includes all nine verified plywood options, including all four Baltic Birch products. A dash means no variant is mapped in that thickness, not a temporary stock outage.
Show all plywood options by thickness
| Plywood option | 3/16″5 mm | 1/4″6 mm | 1/2″12 mm | 3/4″18 mm | 7/8″21 mm |
|---|---|---|---|---|---|
| Prefinished Birch Plywood4 × 8 ft | — | View | View | View | — |
| BB/BB Baltic Birch Plywood4 × 8 ft (1220 × 2440 mm) | View | — | View | View | View |
| White Melamine Plywood4 × 8 ft | — | View | View | View | — |
| Prefinished Maple Plywood4 × 8 ft | — | — | View | View | — |
| B/BB Baltic Birch Plywood4 × 8 ft (1220 × 2440 mm) | — | — | — | View | — |
| Clear Prefinished Baltic Birch4 × 8 ft (1220 × 2440 mm) | — | — | — | View | — |
| White Melamine Baltic Birch49 × 98 in (1250 × 2500 mm) | — | — | — | View | — |
| Wood-Tone Melamine Plywood4 × 8 ft | — | — | — | View | — |
| Light Gray Melamine Plywood4 × 8 ft | — | — | — | View | — |
The quarter-inch birch and white melamine sheets have one finished face. There is no 6 mm Baltic Birch in this mapped range. The 21 mm option is unfinished BB/BB only. Inch names are nominal catalog labels, not exact conversions of the metric specifications. Check product details for tolerances.
Quantity pricing, pickup and delivery
Bulk pricing on eligible sheets
Build your sheet order, then review the current quantity rules and final discount at checkout.
10+ sheets · 10% off20+ sheets · 15% off50+ sheets · 20% off
Pennsauken pickup or delivery
Confirm that your order is ready before visiting the NJ warehouse. Delivery depends on your destination, materials and route. Curbside customers must be present and arrange help to unload.
Questions about 7/8″ plywood
Is 21 mm plywood exactly 7/8 inch?
No. An exact 7/8 inch equals 22.225 mm. This Berta product uses a nominal 7/8-inch catalog label and a listed 21 mm specification. Order against the required metric specification and confirm actual panel thickness and tolerance before machining.
Which 7/8-inch plywood is offered here?
The verified option is unfinished BB/BB Baltic Birch, listed as 21 mm, in a 4×8 format (1220 × 2440 mm). This page opens the existing 21 mm product variant, not the 18 mm default.
How many plies are in the 21 mm Baltic Birch?
The listed 21 mm BB/BB panel has 15-ply birch construction. The 18 mm BB/BB option has 13 plies; do not apply either specification to a thinner variant.
Is 7/8-inch prefinished or white melamine Baltic Birch available here?
Not in the verified assortment for this page. The 21 mm option is unfinished BB/BB. B/BB, clear prefinished and white melamine Baltic Birch are linked as 3/4-inch alternatives in the full-range comparison.
Can I use this instead of structural subfloor plywood?
Do not assume this cabinet-grade panel is a structural subfloor product. Use the grade, span rating, certification and installation system required by your project. A nominal thickness or water-resistant glue claim alone does not establish suitability.