Great Design Work! I love clean design. Most designers do too much. The standard size over here in the U.S. is 3.5 x 2. The safe zone would be 3.25 x 1.75 in that case over here. I've been in printing for 17 years and I appreciate you showing the bleed in your art. That one simple thing is what most designers wont even consider. (bleed is the area of the design that is literally cut off in production)