Not sure the episode this was drawn for, but it's season 4. Found a couple eBay auctions:
"This is a used photocopy artwork from the EFX Shop that makes the props. Artwork is 17x11 and is production used."
"This is a production used artwork for the EFX Shop that built the prop. Artwork is 8 1/2x11 blueprint. Artwork is for school pad."
You'll notice that it has been drawn on 1/2" grid paper. And the arcs have been traced as full circles, showing the handle to be a 6 1/4" radius. And the top corners are 2" radius. The rest are 1/2" radius.