Buying Guide · Reading the Stamp
Decoding Plywood Labels
Every genuine sheet of plywood carries a stamp on its edge that tells you far more than the price tag does — size, thickness, grade and any specialty treatment, if you know how to read it.
Four Things Every Plywood Label Tells You
Size
8x4 ft is the standard sheet, though 7x4 ft, 7x3 ft and 8x3 ft alternatives are also available for projects that suit a different footprint.
Thickness
Standard steps run 6mm, 9mm, 12mm, 16mm, 19mm and 25mm, with some specialty sheets available thicker still.
Grade Stamp
MR, BWR or BWP grade, along with the relevant IS standard (303 or 710), tells you exactly what moisture resistance the sheet is rated for.
Specialty Markings
Marine grade, fire-retardant, termite-proof and E-0 emission labels each indicate an additional treatment beyond the base moisture grade.
Matching the Label to Your Project
Start with your project's size and thickness requirements, then check the grade stamp matches the moisture exposure the piece will actually face, and finally look for any specialty markings relevant to your specific need — fire safety compliance, termite risk, or indoor air quality in enclosed furniture. Buying on label alone, without inspecting the sheet, is riskier than doing both together.
Going Deeper on Any One Label
See our ISI 710 vs ISI 303 guide for the two main Indian grading standards, our MR vs BWR vs BWP grade guide for the moisture-grade names you'll see stamped on a sheet, and our E-0 emission plywood guide for that specific specialty marking.
Frequently Asked Questions
What information is stamped on a genuine plywood sheet?
A genuine sheet typically carries its size, thickness, moisture grade (MR/BWR/BWP), relevant IS standard number, and any specialty markings like marine, fire-retardant, termite-proof or E-0 emission grading, stamped on the edge.
What is the standard plywood sheet size?
8x4 ft (also written 4x8 ft) is the standard, though 7x4 ft, 7x3 ft and 8x3 ft sizes are also available for projects that suit a different footprint.
What thicknesses does plywood typically come in?
Standard steps are 6mm, 9mm, 12mm, 16mm, 19mm and 25mm, with some specialty sheets manufactured thicker for specific structural needs.
How do I verify a plywood grade stamp is genuine?
Check for a clear, consistent stamp with the ISI mark and BIS licence number where applicable, and buy from an established dealer who can show the certification on request.
Do I need to check labels if I trust my dealer?
It's still worth a quick look — even a trusted dealer's stock can include mixed batches, and understanding the label helps you confirm you're getting the specific grade and specialty features your project needs.
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