Twin Quilt Size Only
 

I have someone who wants me to make them a quilt in blues only. I make only twin quilts size, so how much fabric would I need to purchase for one quilt top?

It will depend on the pattern you are going to use, how many different shades of blue, the background fabric if any and also how you plan to piece the backing fabric or planning to use wide backing on it and what fabric you plan for the binding.

Since you only make, have made, twin size, what general amounts have you needed to use before is a good partial ballpark guide as well more importantly, what I wrote above.

I read somewhere (generally speaking) that you need 4 yards for a twin, 6 for a full, 8 for a queen and 10 for a king.

Dont know if its true....

Yes, you are correct. That's 4 yards for the top and 4 yards for the bottom, so a total of 8 yards for a twin size quilt.

I would first have the person pick out a pattern you both can agree upon, then go to the fabric store to have him/her pick out and buy the fabric. That way there is no disagreement or disappointment with either one. Nor is there any misunderstanding of price if you are going this for money.

I agree with quilting candy, get the person involved with the quilt making process. Pick out a few quilt patterns you feel comfortable making and have them pick one. That way the person won't pick out a complicated pattern you're not comfortable making. Then go to the fabric store together and have them pick out the fabric with your guidance. You can decide ahead of time how much of each color you will need for the quilt. Then pick out the backing and binding fabric. I'd also buy a little extra of each fabric for those little cutting mistakes we all have made.