well there should be a strap on the bottom that gos under your foot. You strap Velcro or button's should be on the inside or the back of your calf
You should wear show pants that match the color of your chaps. You shouldn't wear jeans unless it is a small local open show or if your a man.
Outside
This depends on how the half chaps are shaped and if they have a zipper. If they have a zipper, then align that properly (usually with the outside of the calf) and see where the stretch panel would be located. In most brands of half chap the panel will sit to the outside or rear of the leg. If in doubt call the manufacturer or look at their website for more details.
The equipment used in horseback riding for english, is a saddle, a girth, a bridle, reins, maybe a martingale, a helmet, maybe a breastplate, and boots, half chaps, or full chaps. You can wear: Helmet, riding gloves, boots/chaps Western: Saddle, bridle, reins, maybe a martingale and/or a breastplate or helmet, boots & chaps. Note: Western ewuipment is built differently from English Also, it is posssible to ride without a saddle (& girth) or bridle.
You don't have to wear chaps when riding, it mostly depends on where you are going to be. If you are going to be riding where there is a lot of brush you might want to wear them, just remember that if the brush hurts you it could also hurt your horse. It can also save your legs from being rubbed against the saddle.
To protect the rider's legs
there half chaps. ridders use them so they don't get rubs on there legs.
Chaps are worn by Western riders and are buckled around the waist. Half Chaps are worn by English riders and only go up to your knee cap.
Half chaps can be purchased from a variety of saddlery retailers like Apple Saddlery, Dover Saddlery, Equestrian Collections, Equine Now & Pro Chaps. You may also find Half chaps available on Ebay and Amazon.
assless chaps
You should wear show pants that match the color of your chaps. You shouldn't wear jeans unless it is a small local open show or if your a man.
they stop the saddle from pinching your legs!
Assless chaps.
chaps, usually with tassels. chaps are leather pants pulled over riding pants to protect from branches and stickers , you proudly wont see these obstacles in a rodeo but chaps are still worn
Outside
A chainmaille bikini, and leather chaps.
Assless chaps and leather vests