Sizes

OSB panels are available in a variety of thicknesses and sizes as shown in Table 1.

Table 1:  OSB – Thicknesses and Weights
OSB (O325)
Thickness 1220 x 2440mm (4’ x 8’)
Panel Weight
mm. in. kg lb.
9.5 3/8 18 40
11 7/16 21 46
12 15/32 23 50
15 19/32 29 63
18 23/32 34 76
22 7/8 42 92
28.5 1-1/8 54 120
Notes:
1.weight calculated on the basis of 640 kg/m^3 (40 lbs/cu.ft.) density and nominal thickness.
2.15 mm (19/32 inch) thick and thicker are available in either square-edged or tongue-and-groove on the long edges.
3.thicknesses are available on special order.

The most common panel size is 1220 x 2440mm (4′ x 8′). Panels can also be made to a metric size of 1200 x 2400mm. Panels may be specially ordered up to 2440 x 7320mm (4′ x 24′). Larger panel sizes are desired by the manufacturers of wood I-joists because the long lengths reduce the need for web splicing.

Sizes smaller than the standard size can also be specially ordered.

Thicknesses are available from 6mm (1/4″) to 28.5mm (1-1/8″).

Panels may be sanded on one or both faces on special order.