Knock Knock Penny Adult Unisex Big Bang Theory Gift Idea Funny T-shirt - M / Black
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Price history
We started tracking this price on 24 Oct 2026. The chart fills in as prices change, so you can see whether today’s price is a good one.
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About this product
Knock, knock, knock, "Penny?" Any fan of the hit sitcom "The Big Bang Theory" will instantly recognize Sheldon's trademark knocking pattern from his frequent visits to Penny's apartment. Order your t-shirt now, and start annoying your neighbors with your attire in addition to your Asperger's. Black or Red 100% Cotton Officially Licensed Standard Fit More 'The Big Bang Theory' items: The Big Bang Theory Merchandise Size chart
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