I think for the size you mention, you need 2 jelly rolls.
I just made a Q top with one jelly roll, and the finished product is about half of what you say I should have. Kay

Did your roll have 40 strips in it? If you do the math, it should turn out that size with 40 strips.
40strips x 40" = 1600" x 2.5"
fold once- 800" x 4.5"
fold again- 400" x 8.5"
fold again- 200" x 16.5"
fold again- 100" x 32.5"
last fold - 50" x 64.5"
Add borders and voila' you have a quilt!
Hope that helps.
Robin

I made a baby quilt top in just 1 hour with this method. THANK YOU!!! The only thing I will change in the future is that I will not repeat a dark fabric. I ended up with a section that was just the same dark fabric. However,I love, LOVE, this method for a speedy gift. I am going to try to back mine with fleece and not use batting! Thank You!

That's awesome! The fleece idea sounds great. Let us know how it turns out!
Robin

suggestion! In those areas where the colors line up and create blocks of the same color and texture? That would be an excellent place to practice a bit of applique with fusible webbing. <wave>

Thanks for the idea! I don't yet know how to applique. This will be a great project to learn on since it is so quick and fun. Oh, It took less than 1 jelly roll to make a baby quilt!

There are two types of fusible webbing.
One type has fusible on only one side. Suppose you have an orphan block - - say, a 9 patch ... stitch the fusible, right side of the fabric to the glue side of the webbing (do not use an iron yet) ... stitch around all four sides of your block. Carefully lift the webbing away from the block and cut a slit in the webbing - - you will turn the block to the outside, which will put the glue side of the webbing ready to be ironed into place on your quilt.
It would be a good thing to purchase a teflon sheet designed to withstand being ironed for the next step.
Following the ironing instruction on your webbing sheet, glue your block to your quilt. When it has cooled, you can use any decorative stitch to top stitch the edges of your block on to the quilt top. Easy applique ...
if you don't happen to have a block, then cut around a picture in your novelty fabric, follow the same instructions, and VIOLA! You have created a theme quilt. I am going to look for a link that will help you see how to use the single sided webbing in the manner to which I am referring <wave>

Thank you so much. I am printing your tips/advice to help me!

Thank you so much. I am printing your tips/advice to help me!

I did a search, and this is one of the sites I found:

http://quiltinaday.com/theater/block/block01.html

it is Eleanor Burns, and bless her heart! I am not looking any further!
I am busy watching the block party theater. This link is promised to show you the technique I was discussing. If it doesn't, I shall return <g> however! You can learn a lot from Eleanor Burns, so turn up your sound and ENJOY! <wave>