From sparring gears the Shin guards and shin-instep guards are protective equipments used in martial arts tournaments and sparring matches to help protect your shins from low kicks as in kickboxing, taekwondo sparring match and mixed martial arts tournaments.
I.e. used to protect the rod foot strikes the bottom of the foot or the fall or wrestling moves aimed at paralyzing the opponent or break his leg stubble such as professional wrestling and mixed martial arts

A lot of types and designs of shin gears cover many areas of shin-bones:
Black shin guards used to protect the lower leg bone from the ankle to the first pre-knee, it is a clothing or fiber cloth is wrapped around the leg of both.
available over there with many sizes to fit all ages of martial arts prationers
Child Med     9"
Child Large     10"
Small     11"
Medium     12"
Large     13.5"
X-Large     15"

Macho Dyna Shin Guards: Consists of two pieces, each a half-cylindrical cover Introduction leg or a half-cylindrical to cover the forearm from one direction as opposed to the other, which is wrapped around the leg of a fully two-way
consists of two pieces for knee-to-ankle or wrist-to-elbow coverage, or you can use both to cover one arm or one shin.
Length should be measured from the top of the ankle to the bottom of the knee
Size     Length
Child     10"
Small     11"
Medium     12"
Large     13.5"
X-Large     15"

Century Creed MMA Shin Instep Guards
Consists of a pair of pants to protect the foot from the first toe and even before the pelvic area. Used mainly in mixed martial arts matches. Made of leather, foam, make it fully retractable carrying confrontations in fighting violent games and lasts for a long time. No you will not need to buy another one after each game.
Century sparring gears always tested and approved by martial arts instructors and schools over world.

Ringstar Shin Instep and Toe Pads
Premium SuperShin(tm) Guards this group is characterized by lightness and ease of use as it offers an excellent level of protection for the toe and the outskirts of the foot and shin bones, consists of  High density foam spines give them additional structure while still maintaining the ability to adsorb impact.
These pads are covered in vinyl and have 2 elastic and velcro wrap around straps to secure them over your shins, an elastic strap under the under the instep and toe to keep the everything secured!

Adidas WTF TaeKwonDo Shin and Instep Protector
Special group to protect the leg consists of 5 layers of flexible bear strong shocks during fights. Thick layers to protect the ankle to increase the protection of the player martial arts

Full list of shin gears and foot protectors for Karate, taekowndo, and MMA:
    Black Cloth Shin Guards
    $13.95
    Foam Shin Guards
    $19.95
    Cloth Shin Guard
    $8.95
    Ringstar Shin Instep and Toe Pads
    $29.95 $19.95
    Vinyl Shin Guards
    $17.95
    Century Creed MMA Shin Instep Guards
    $89.95
    Century Creed Traditional Shin Instep Guards
    Leather Shin-Instep Protectors
    $54.95
    Macho Warrior Shin Guards
    $26.95
    Macho Dyna Shin Guards
    $21.95
    Vinyl Shin Instep Guards

It was a list for most recent protection gears for foot, ankle, shin, toe, and full leg pants.
No links referred by any merchant, just decide whatever you need and go to amazon or wallmart and buy them.

Another valuable product:
Lightning Blue Karate Sparring Gear Package
Macho Martial Arts - Dyna 5 Pc. Sparring Gear Set

Full Lightning Karate Equipment Deal, Head, Punches and Kicks, and I will explain to you the exact properties and advantages that will inspire you and your kid will love it, and if the Size is your problem; I have TWO solutions!

• For a Kid three/4 shoe.
• 1/2" thick vinyl protected foam gives safety for sparring over the entire foot and ankle.
• Karate Sparring Gear quality: made from Foam material called velcros, the velcro’s are all good quality and keep the gear in place.
• Worth the money; any Dojo may be sell sparring gear equipment for $90 or even $100, so it will save you the half of the Dojo’s Price, that’s what you needs.

Sparring Gear set problem of size for Kids younger than 6 years old:

1. Wait until your Kid grow: This Sparring Gear is ideal first sparring set for 6, 9, 10, 12, 13 years old children, either boys or girls, but for younger kids may the kicks shoes be a little big but the headgear will fits well, until the child grow in this gear set.
2. By bundling some types: Do not be afraid of Sizes because sparring gear set contains 3 different "types" of gear: are head, hand and feet If you buy each piece individually, you can adjust the sizes better and get the exact size for each of the gear types and trust me that by bundling some types will not end up being the wrong size. Absolutely, all the sizes will fit well.

Do not hesitate, it is a big fortune to save half the price for your son/daughter's sparring gear and let he/she enjoy the Karate Dojo's classes. Make them Happy Now.