Double A A4, A3 and Legal 80 GSM Photocopy Paper: Specs, Sizes and Uses (Sri Lanka, 2026)

What is Double A 80 GSM photocopy paper, and how do A4, A3 and Legal differ?

Double A 80 GSM photocopy paper is a white, multipurpose office paper weighing 80 grams per square metre, supplied in reams of 500 sheets, and engineered for laser, inkjet and copier use. The three formats differ only in sheet dimensions: A4 measures 210 × 297 mm, A3 measures 297 × 420 mm (exactly twice the area of A4), and Legal measures 216 × 356 mm (8.5 × 14 inches). All three share the same 80 GSM weight, the same brightness, and the same surface, so the right choice comes down to the size your document needs rather than any difference in paper quality.

Below we break down what 80 GSM actually means, the verified technical specifications of each Double A size, where each format fits in a Sri Lankan office or home, and the buyer questions we hear most often. Each size links to its live product page on Officestationery.lk.

What does 80 GSM mean?

GSM stands for grams per square metre: the mass of a single square metre of the paper. At 80 GSM, Double A sits in the standard office band that balances feel, opacity and cost. Verified supplier datasheets list Double A 80 GSM at a calliper (thickness) of roughly 106–112 microns, an opacity of about 95%, and ISO brightness around 100–104%, which keeps text on the reverse side from showing through and helps blacks and colours stay crisp.

The A-series itself is governed by the international standard ISO 216, which uses a constant aspect ratio of 1:√2 so that folding any sheet in half produces the next size down at the same proportions. That is why A3 is precisely double A4: fold an A3 sheet in half and you get A4.

Double A A4 80 GSM: the everyday office and study size

Double A A4 80 GSM Photocopy Paper is the default size for reports, letters, invoices, school worksheets and general copying. A4 (210 × 297 mm) is the global office standard used almost everywhere outside North America, which makes it the safe default for printers, scanners and document templates in Sri Lanka.

Key specifications

• Brand: Double A
• Weight: 80 GSM
• Size: A4 (210 × 297 mm)
• Ream: 500 sheets
• Colour: White
• Suitable for: office printers, inkjet and laser jet, and photocopiers

Double A A3 80 GSM: for larger layouts and double-up printing

Double A A3 80 GSM Photocopy Paper measures 297 × 420 mm, which is exactly twice the area of an A4 sheet. That extra space suits posters, spreadsheets, drawings, schematics and 2-up booklet printing. Because the weight and surface match the A4 and Legal lines, you get consistent print results whether you scale a job up to A3 or print it at A4.

Key specifications

• Brand: Double A
• Weight: 80 GSM
• Size: A3 (297 × 420 mm)
• Ream: 500 sheets
• Colour: White
• Suitable for: A3-capable office printers, inkjet and laser jet, and photocopiers

Double A Legal 80 GSM: for contracts and long-form documents

Double A Legal 80 GSM Photocopy Paper measures 216 × 356 mm (8.5 × 14 inches). The Legal format is part of the US/North American paper series and is widely used for contracts, agreements, deeds and other documents that need a longer page than A4. Its extra length lets you keep clauses and tables on a single sheet rather than spilling onto a second page.

Key specifications

• Brand: Double A
• Weight: 80 GSM
• Size: Legal (216 × 356 mm / 8.5 × 14 in)
• Ream: 500 sheets
• Colour: White
• Suitable for: office printers, inkjet and laser jet, and photocopiers

Why fibre count and brightness matter for print quality

Two paper sheets of the same weight can perform very differently depending on how the fibre is structured. Double A attributes its smoothness and toner adhesion to a denser fibre network. According to the manufacturer:

“Double A paper contains 22M fiber per gram compared to other brands that contain only 13M fiber per gram.”

Double A, corporate website

A higher fibre count generally means a smoother surface and fewer loose particles, which helps reduce jams and gives sharper text. Combined with the line’s ~95% opacity, that makes 80 GSM a sensible everyday weight: heavy enough to limit show-through for double-sided printing, light enough to stay economical for high-volume copying.

Sustainability: paper from farmed trees

Double A sources its short-fibre pulp from fast-growing eucalyptus grown on the borders of rice paddies through its Khan-Na (“paper from farmed trees”) programme, rather than from natural forests. The company states that these trees are “tended and cared for by more than 1.5 million Thai farmer families,” giving buyers a traceable, agroforestry-based supply chain rather than conventional forest harvesting.

Office paper is still a growing category

Despite the shift to digital, demand for office copier paper continues to rise. Zion Market Research valued the global copier paper market at USD 17.76 billion in 2024 and projects it will reach USD 26.54 billion by 2034, a compound annual growth rate (CAGR) of 4.1%, driven by sustained use across education, corporate and government sectors. For Sri Lankan offices and schools, that means a stable, well-supported product category where stocking a reliable 80 GSM ream remains a practical default.

Frequently asked questions