The most common plywood sheet dimension, 4 feet by 8 feet, translates to the metric dimensions of 1,219 by 2,438 millimeters. hardwood plywood comes also in abbreviated sheets measuring 2 by 2, 2 by 4, and 4 by 4 feet, while utility-grade plywood comes in longer 4-by-10-foot sheets.. Sheets of plywood available in different sizes and actual width, length and thickness depend on manufacturer�s product line and plywood type. but most local retailors offer only a few standard sheet dimensions which typically 4 feet in width and 8 feet in length or smaller as a stock option.. Divide by the total square footage by the square footage of a sheet of plywood to find the number of sheets required to cover the space. a 4