These are custom-made for us. Has whistle, serrated removable blade, fire starter, and ~10 feet of 7-strand paracord (the good stuff). We used a muted color, so as not to draw attention to yourself. Wear it on your wrist, backpack, belt, key chain, etc
Use it to make a shelter, trap or snare, fishing line, net, bow for fire starter, sling or splint for broken bones, tourniquet, garrote, trail marker, shoe laces, tent/backpack/clothing repairs, belt, weapon, floss, etc. There's really no end to the uses of a survival paracord bracelet.
Small will fit a child's wrist (up to age 10-11). Large fits everyone else.