assuming you mean 20ft by 30ft, you just find the area. To find the area, simply multiply both sides, so 20x30 = 600 sq ft
When looking for a picture frame in size 20 by 30 you will find many of them are made form a material called M,D,F this can be found in many shapes and sizes.
One can purchase a 3x5 picture frame from photography stores such as Blacks, or one can go to a department store such as Walmart or Shoppers Drug Mart and find a picture frame there.
You would be able to purchase a BMX frame from a retailer that sells BMX bikes. You could probably even find some used/old ones from craigslist or ebay.
Wedding frames are suitable to display wedding picture in or in scrapbook. One could purchase a frame as a wedding gift to someone. Wedding frames can be purchased from Personal Creations and they have options to have the frame engraved, autographed or etched with a personal message. The besides you frame are $24.99 or there are frames to put on the wall which are larger.
You can head on down to your local bicycle shop to find a selection of bicycle frames. It might be better to see them in person than to purchase it online.
You can find a 5 x 7 inch picture frame in Paris available from the Home Bello shop. You can also purchase these frames online from retailers such as Amazon.
There are many places where one can find a replacement mirror that would fit an oval frame. One could find a replacement mirror that would fit an oval frame at popular stores such as Walmart, Target, or Lowe's.
One can find and purchase angora socks from several different places. Some of the places in which one can find and purchase angora socks are: eBay, Amazon, and JCPenney.
In order to purchase a Nikon tripod, one could find offers on the official homepage of the vendor (Nikon dot com), or you could purchase used devices on eBay or similar.
you could find them on Itunes
You can find a lineup of Zippo lighters available for purchase online at the Zippo website. Alternatively, you can purchase these lighters from the Amazon website.