@Hana_rain Thank you! :[ I also have a pretty small wrist. I find that I can make patterns like this fit when I use DMC No. 5 pearle embroidery floss, however, you cold try using No. 8 for am overall smaller bracelet. There's also sewing thread, but I have no experience working with it.
@Natalie157 I generally make my base strings 16"+ to accommodate most wrist sizes. As for the knotting strings, you could longer (~1yd) scraps for the red and blue, but I generally like knot directly from the skein, without cutting. 😄