hook size will depend on yarn used. scheepjes cotona makes 5 1/2 inch square stylecraft dk makes a 6 inch square This square is the center of my larger Kay Marlene 18 inch block. They can be paired or used separately. colors are endless. This is a 3d pattern with endless texture and squishiness. All you need to know are the basic stitches. YouTube tutorials can help with anything you may not know. Most anyone should be able to do this pattern. yardage depends on the amount of colors you use.