There are many ideas that people use to make bracelets adjustable.
Bracelet shackles and velcro straps work well, but there are options where you do not need those supplies. In this video I present the most simple ones.
Various styles of adjustable bracelets are also presented here:
http://www.paracordguild.com/make-adjustable-paracord-braceletEnjoy the video!
Music by Kevin MacLoud and Jey Row.