Custom quilts are tricky. The ideal situation is for you to make quilts and have folks buy from that inventory. (Hear that folks? Etsy shop.) If someone wants a custom quilt to go with the colors of a particular nursery, tell them how much fabric is needed and let them go buy it. You can point them to online and local resources if there are some quilt shops in their area or loan out your color cards on a deposit. It's important to make sure they know the difference between quilt shop quality fabrics and big box store or home dec material. This approach saves you from spending lots of time trying to find the right colors, when the client already knows exactly what they are looking for. The other benefit is that you only have to quote the cost of labor.
My baby quilts are usually in the neighborhood of 60"x40" before washing. Depending on how they are pieced and quilted, I usually see shrinkage in the neighborhood of 3-5%. I haven't ever measured 6% shrinkage, but I've heard from others that it's totally possible. If someone wants a quilt of a certain size, let them know that you can hit it within 5" in either direction, but that the nature of fabric, quilting, and laundering makes it nearly impossible to have specific dimensions when that quilt comes out of the dryer. It should be pretty easy to hit the mark within 2"-3" in either direction of the desired measurements. Do let your client know that design elements near the edges of a quilt may be cropped differently depending on how the squaring process goes.
Pre-wash dimensions: 62 1/8"x 41 5/8"
Post-wash dimensions: 59 3/8"x 39 3/4"
Batting: Warm & White from The Warm Company
Front Fabrics: Kona White, assorted prints including three Razmatazz Hipster prints
Back Fabric: Modern Meadow Herringbone in Pond by Joel Dewberry
Binding: Centennial Solids Silver Lining
Quilting: Angela Walter's "paisley" free motion quilting with the Janome Horizon 8900 QCP
I'd love to hear any lessons ya'll have learned from making custom quilts either for free or for revenue ;-)
I did have to make a test quilt for this guy, so I look forward to sharing those photos this week!