Cut out two pieces of hemp cotton fleece and one piece of microfleece to size. Small (newborn size)- 10 inches long by 4 inches wideMedium- 12 inches long by 5 inches wideLarge- 14 inches long by 5 inches wide

Fold in half and round the corners so it lays nicer. 

Repeat repeat repeat. Use the first one you cut as a template to cut the rest.

Stack 2 layers of hemp and one layer of microfleece together with the right sides out and the microfleece on top. 

Serger option- Serge all the way around the edges of the insert. The serger will cut off any of the extra fabric where you were maybe a little bit uneven.

Sewing machine option- Place all 3 layers underneath the presser foot and sew all the way around using a standard stitch about 1/4 inch from the edge, making sure to catch all the layers. Make sure to back and forth stitch at the beginning and the end. Cut off any excess and uneven fabric. This is where it is really nice to use a serger, since it already does that for you. Place the insert back under the sewing machine foot and finish off the edges with a zig zag stitch. Go all the way around the edges. Trim extra thread.