This one just in, it measures 43.5cm to 44cm pit to pit, which makes it 17.3" pit to pit as described.

Based on the seller's description, it's 17 inches by 29 inches.
Gotta measure it myself to double check.
Now where's the measuring tape...

Got it from Rainbowgasoline. Clicked on the link you posted. Glad to know they have been in business since '85 but well as you said, Harlequin and Overkill make very strange bedfellows. Haha. One is promoting the display of wildlife graphics on t-shirt while the other is gritty New York thrash metal ...

Hey guys! I received my Overkill Feel The Fire 1986 tour t-shirt in the mail today and while the quality of the t-shirt is unmistakably good, my attention was once again drawn to the tag on the t-shirt. This time it reads, Harlequin Nature Graphics Medium See Reverse with a whale leaping across the ...