Align the granny squares with right sides facing the way you want the seam to look
Use whip stitch to sew through the outer loops of matching stitches
Use slip stitch join by holding squares together and working through both edge loops
Use single crochet join by crocheting through both squares along the edge
Use invisible mattress stitch for a nearly seamless join
Use flat slip stitch join for a neat, low-profile seam
Use join-as-you-go by connecting squares while making the final round
Block all squares before joining for even edges
Match stitch counts along each side before joining
Join corners first if needed to keep edges aligned
Weave in yarn tails after finishing the joins
Use the same yarn weight and hook size for consistent seams