Up for sale is a monitor filter for reducing the glare on older CRT type monitors. This one measures about 14.25 inches diagonally and will probably fit most 13-14 inch CRT monitors / terminals. The hanger part (that goes on top of the monitor) is adjustable somewhat - see picture. The screen is glass. inmac brand. The flap that goes on top of the monitor likely will need a piece of double-sided tape to secure it to the screen as if you just open it and hang it on the monitor, it will flop and fall off. Please keep this in mind when considering your purchase!
This measures about 14 1/4" diagonally (measuring the glass only). And it measures about 9 1/2" vertically X about 13" wide - measured from the outer edge of the plastic. It is also about 3/4" thick - measured at the thickest part. The flap at the top is about 2 3/4" deep (towards the back of the monitor) by about 5 7/8" wide.