It's over 20 years for me. I made two "bunny" quilt tops before my grandson was born. Finished his up and kept the other one until last winter when I finally dug it out and hand quilted it. It still needs a label, so isn't finished yet! He will be starting his 2nd year of college this fall and will be 21 in January...I have several more that are getting whiskers and need to get them done. I'm much better at making quilt tops than I am at the quilting.