This arrived in the post yesterday if is an adjustable ruler designed here in Aus...it has a black fabric guide on the back and you move this to the desired size of the strip you want to cut lock it into place then that guide lines up with the straight edge of your fabric....great for all those funny measurements we have to cut.....then go for it...cut as many as you want only having to get the measurement right in the first place.....they can be purchased from Aussie Patches...Westalee Design Adjustable Ruler comes in several sizes... 
