I used half of a Kate Spain Central Park Jelly Roll i.e. 20 pre-cut 2.5" strips, separating the strips according to colourways.
Yesterday I got it finished, quilting it with diagonal lines and Free Motion Quilted flowers in the diamond gaps, and bound in aqua stripes.
Might do a bit more quilting in the border.
The back - this is actually aqua, but evening light doesn't show it up.
The finished quilt measures 42" x 48" (each block is 6.5" finished) however you could easily make this quilt bigger by adding more borders.
Using more strips from the Jelly Roll, you could sew some together lengthways to make a scrappy border, followed by another plain border, finishing with your binding. You could even make your binding from more leftover jelly roll strips.
Jelly Rolls are great to use because they take a lot of the work out of cutting your material, the 40 strips are all co-ordinated because they come from the same fabric series, and they go a long way - you can get lots of projects from one JR. I still have enough left over to make another cot quilt (which will be in different colours from this one), and with the trimmed strip ends, I made this trivet:
If you've never used a JR before, have a go, shop around for some bargains, and make sure you get 40 strips in your roll (you can buy half JRs on Ebay, and some designer JRs only have 30 strips).