Product review (5 stars): Perfect fit, heavy duty & sturdy
Perfect fit for my new 5 Qt Artisan tilt-head mixer glass bowl.  I don't know why they don't include this lid with the mixer.  The lid says "Non-sealing" on it, but it actually does seal, complete with the little burp when you clip it over the spout.  The recessed spot is perfect for the part of the mixer where you attach your beater.  It lowers right into it with about 1/8" to spare.  I have the KSM155GB.