For best results, wet block each side to 16″ x 16″ before attaching them together. This will help stretch the panels to the final size and allow the stitches to relax and settle into a nicer shape. For a video demonstration of wet blocking, check out this resource:

All About Blocking

Check your gauge! Make a swatch of single crochet with the recommended hook size before beginning your pillow. You’ll want to be sure your gauge matches that in the instructions so your pillow will fit the form! Compare your stitch measurements to what’s listed in the gauge section above and adjust the hook size until your measurements match.