Star Trek Commercial Poster Live Long and Prosper. This product data sheet is originally written in English. This poster is 23 by 35 inches approximately and is in mint condition. Conversion Table: Inches to Centimeters. 12 x 12 inches is approximately 30 x 30cm. 11 x 17 inches is approximately 28 x 43cm. 12 x 18 inches is approximately 31 x 46cm. 18 x 24 inches is approximately 46 x 61cm. 20 x 30 inches is approximately 51 x 76cm. 24 x 36 inches is approximately 61 x 91cm. For other dimensions please use the following conversion rate: 1 inch is equal to 2.54 centimeters, and 1 centimeter is equal to. If you have any difficulties with calculating dimensions, please let us know. The math-geniuses at Postersultan will be happy to help you out! Or at least we can try. If you would like to know more about us, our business or our products please check out our about me page. ATLEAST 1 OUT OF 10 ITEMS NEVER REACHES ITS DESTINATION. They are more clearly stated in our about me page. You can see them by clicking on the word ME next to our username POSTERSULTAN. Powered by SixBit’s eCommerce Solution.