If you have crocheted other granny squares in the same yarn, weigh a square on a kitchen scale. Now, measure the square on both sides to find the area. A standard queen-sized blanket would be 90x90 or 1800 sqare inches. Divide that by the area of your square. Multiply the answer by the weight of your square. Divide that by the weight of one skein and you will know how many skeins to purchase. I suggest purchasing a couple of extra, just in case.

I did pretty much the same way zipper_tx did, but instead of crocheting them together, I slip stitched them. It will leave a nice little ridge, and when adding strips together, they look like a bunch of little blocks...I left a long enough tail on both sides, and tied them in the back of the work. I also slip stitched each vertical strip adding alot of dimension. Hope this helps... Marlene

The rounded corners are fine. Just don't join right to the corner just go as far as you can so it lies flat and you'll have a four sided star where the corners join. I suggest you sort your squares into large and small squares. Lay out all the small ones into a square or rectangle whichever your finished afghan is going to be and then do the larger ones on the outside. It might help if you lay them all out on the floor like a finished afghan. When you have a good arrangement take each row and pile them one on top of the other now string them together with a strand of yarn and attach a piece of paper with row 1 on it or use different colored wool for each row and then mark color and row number on a paper. This way you'll know exactly which row goes where. Sew one row together and then another and then sew the 2 long stripos together

Open down the front or closed?