Plywood size generally refers to two main aspects
1. Length and Width Dimensions

The international standard plywood size is 1220 mm x 2440 mm (or 4 feet x 8 feet)

However, in some countries or stores, you can also find other variations such as:
900 mm x 1800 mm
1000 mm x 2000 mm

But the size of 1220 mm x 2440 mm is still the most common on the market.

2. Plywood Thickness
Plywood is available in various thicknesses, from very thin to quite thick,
The thicker the plywood, the stronger and stiffer it is, suitable for heavy construction such as floors or partition walls. The thinner ones are suitable for upholstery, interiors, or crafts.

8.5 x 1220 x 2440 mm

11.5 x 1220 x 2440 mm

14.5 x 1220 x 2440 mm

17.5 x 1220 x 2440 mm