Jan: Thanks for the compliment but wize I am not on this one. Pearl cotton is a whole different ball game due to its size and weight. It is going to take a whole sack full. Let me think on this. However, this is the way I would do it.
Divide the quilt in 1/4. It appears to be mirrowed imaged in 4ths. Then casually measure each motif. This doesn't have to be exact to get the total inches. Multimply by 4. Then take a sample piece and thread and cut a a certain amount of thread off - say 20" Stitch enough to take up 18" of the thread. Measure and compare with your inches you got from measuring the design. I realize this will take a bit of time but will give you a reasonable amount of thread you will need. I assume the Pearl cotton has some differences in dye lots so getting enough to finish the quilt might be important. In case there is a difference in dye lots, I would leave some units until last in case the dye lot was different and you had to buy more thread. Perhaps all of one kind of motif. This way the slight differece would not show.
A question: How do you plan on transferring the design to your fabric.
Last edited by Holice; 04-08-2012 at 08:16 AM.