The quilting spacing is determined by the batting ... some give as large of a space as ten inches.
Meanwhile there are some batts that require 3" spacings.
So what size is your hand? ... most adults would be larger than three, but definitely smaller than ten!
When quilting ... are you doing just one line of stitching? or multiple stitchings which would create more stiffness to your quilt.
Another factor would be the piecing ... the smaller the pieces, the more seams which generally is going to create more bulk and may create more stiffness once quilted.