Joining Woven Potholders to Make Placemats

I have no idea how to crochet but have seen people use a crochet technique to do attaching ... Sorry I am not more help :-(

Thank you for your suggestion. I don't sew very well, but I will sure try it.

I don't know about your sewing skills, so it helps if you have some! Just thread a large eyed needle with a matching or contrasting yarn color, lay the blocks side by side, and sew all the touching sides together by passing your yarn through adjacent loops. be sure to tie the yarn at each end when you are through.