Let's Have Some Pun! #1
The fattest knight at King Arthur's round table was Sir cumference. He acquired his size from too much pi.
I thought I saw an eye-doctor on an Alaskan island, but it turned out to be an optical Aleutian.
She was only a whisky-maker, but he loved her still.
A rubber-band pistol was confiscated from an algebra class, because it was a weapon of math disruption.
No matter how much you push the envelope, it'll still be stationery.