Here is my original favorite cloth diaper cover pattern. Fits approximately 15-20 pounds or a general size M.
Be sure to make sure the square inch prints to scale (or resize on your computer). Once printed, tape pattern together by lining up the stars. 1/4″ seam allowance is included on the pattern. You will need two layers of fabric to make this diaper…Either 2 layers thin wool or one waterproof layer and one liner like suedecloth, or thin fleece. You will also need 1/4″ elastic and hook and loop velcro
My tutorial here can help you get a visual picture of sewing this diaper, just use 2 layers instead of 3, and you will need to omit the pocket slit. On these, I normally leave the 3″ hole for turning on the front edge above the velcro.