When someone young or short first see a pair of stilts the first thing they need to know is which size would best suit me, the Junior size or Adult size ?
This is the first question you should before checking which weight range you need.
So how can you tell which will fit without having a pair to try on ?
The Junior size should fit anyone over the age of 7 so the lower range is very small.
When you are about 5' - 5'2" then the Adult size should be just small enough for you to use. You may need to boost the hight of the footplate ( a Flip-flop works for that ) and there's tips on the best ways to do that.
And the Adult size is capable of fitting someone over 6'5" so unless your the Jolly Green Gaint you should be fine.
This is only a rough guide and if possible you should try to find someone who would let you try their pair on to check. They should also be able to help with the weight of spring would be best for you. Most bockers would be more than happy to help you.
We alway quote hight of a person but what really counts is the length of your lower leg.
The minium length of leg ( bottom of foot the the bottom of the knee cap ) wound be the same as the foot plate to the point just below the knee bar .
400mm and you should be alright, 380mm is about a smallest that you could get away with ( if you add a spacer ) and hope to bend your knee to 90 degrees to do tricks. Any smaller and you would be lucky to bend your knee to walk on them but if your still growing quickly then maybe they are still worth getting ?
14 inch mean you should be able to bend your knee without needing a booster under the foot.
The way the straps goes around the back of the knees means people with legs of under 12 would find it very hard to bend at the knee. There is a gray area where you could still use them but couldn't do much more than walk in them !?