You can make a TRW with any size blocks desired. I would draw out the size of the quilt dimensions desired. Then it's an easy matter to divide out the number of inches wide by width of strips - seam allowances, for the total. Same for the length. You'll then be able to determine the number of blocks per strip, and the total number of strips.
Personally, I always take the short cut - I lay it out on the design wall/floor, and lay out the strips overlaping approximately for seam allowances, and then use that visual to help me count. But I'm not a quilter who must have perfect and exact numbers. I'm comfortable with knowing I can modify a pattern, if needed at the end, to alter the final deminsions.
Another thought - if you have something like EQ, graph paper, or even Excel, you can use that to do the same thing a tad more accurately for a pattern like this.
Sorry I don't have the info at hand to share, but still wanted to show you how I would do it if I didn't have any other resource handy.
Hope this helps. Great usage for the jelly rolls!