I rarely make a baby quilt bigger than a yard wide, and not much longer.
The reason being - - I observed, raising my babies, that when they got to be about two years old, they wanted something that they used to have when they were "babies". Big blankets were too hard for them to carry around by themselves, and smaller ones fared better from the constant loving. <wave>
And, it packs much better if they really get attached to it and have to take it with them to grandma's ...