l = 2πr
d = 2r
l = circumference = 41.2cm = 16.22"
d = diameter = 13.12 cm = 5.17"
r = diameter = 6.56 cm = 2.58" π = 3.14
Illustrations
On May-21-09 at 10:19:52 PDT, seller added the following information:
Return
Items must be returned within 30 days . Refund will be given as Money back. Refund policy details: Return is accepted at any reason. Item(s) must arrive to us not later then 30 days after it was shipped out (you will be informed about this immediately after it will be done). Returned items must be the same item in the exact same condition as originally shipped.
Refunds are for the final eBay item purchase price only, less a 10% restocking fee. Shipping costs, insurance, and handling charges (if any) are non refundable. Returns must be shipped insured.