I started off with 24 beautiful fabrics and "narrowed" it down to 15 fabrics for my Trip Around the World. I need to make a large queen. I am thinking that the block size will be either 2.5 - 3 inches. Is this possible? I did a search online as well as own Quilt In A Day books and the most fabrics they use in a quilt are 10. Help? Advice, please?