DerekF wrote:

Carl Kaufmann wrote:

DerekF wrote:

When 3.5 inch drives measure approximately 4 inches wide, 5.8 inches
long and 0.8 inches thick, based on the dimensions of a 1 TB
desktop-class drive.

For a good laugh, look up the various dimensions of the ubiquitous 2"x4"
over time.

I thought that was a piece of wood :-)

2 x 4's (nominal size) are actually 1.5 x 3.5 (actual size). The 2 x 4
starts out at 1.56" x 3.58" (or 1.62" x 3.68" for kiln dried after
milling), and then planed down to 1.5 x 3.5. However, for treated
(green) wood, it's slightly larger: a 2 x 4 is 2-9/16 x 3-9/16 (a 1/16"
fatter).

That's for soft woods. For hardwoods, 2" thickness (nominal) is
actually either 1-13/16 for surfaced 1 side and 1-3/4 for surfaced 2
sides.

http://www.woodbin.com/ref/lumber-dimensions/

Of course, depending on where you buy your lumber, you can have it
milled to whatever dimensions you want at their mill along with paying
more for a special order.