Soccerbuying guide5 min read

What Size Shin Guards Does My Child Need? Age and Height Chart

Shin guard sizing charts use height, but most parents search by age. Here is how to match both, and what to check once the guards arrive.

Photo: Matthew Osborn / Unsplash

By WhatGearFits editorial teamPublished June 26, 2026Updated August 25, 20263 sources reviewedHow we research

Key takeaways

Nike's kids' chart uses height and age; adidas also publishes shin-length ranges, so letter sizes do not transfer automatically.
Use the exact model chart, then check that the guard runs from above the ankle bend to below the knee.
Age can narrow the models to inspect, but it cannot choose a universal S, M, or L.

Write down the measurements

Use the matching size guide before shopping so you are not comparing products from memory.

Check rules and brand charts

League requirements and official model charts can override a generic size range.

Use fit, not age, as the final check

Age gets you started - comfort, control, coverage, and safety decide whether the gear is right.

Quick chart

Official youth shin guard chart examples — do not mix brands
Official chart	Size	Published range
Nike kids	S	48-51 in height; ages 4-6
Nike kids	M	51-55 in height; ages 7-9
Nike kids	L	55-59 in height; ages 10-12
adidas kids	S	8-10 in shin; about 3'11"-4'7"; ages 4-8
adidas kids	M	10-11.5 in shin; about 4'7"-5'3"; ages 7-14
adidas kids	L	11.5-13 in shin; about 5'3"-5'11"; ages 12-18

Size by age as a starting point

Age is a shopping shortcut, not a universal conversion. Nike's current kids' chart lists Small for 48-51 inches and ages 4-6, Medium for 51-55 inches and ages 7-9, and Large for 55-59 inches and ages 10-12. adidas publishes a different kids' system that includes measured shin length and broader overlapping age ranges.

Those differences are the reason to name the chart. A Nike Large does not establish the adidas size, and neither chart automatically applies to another model. Start with the player's current height or shin length, then use the exact product chart.

Record standing height in inches and centimeters.
When the model requests it, measure shin length from below the knee to above the ankle.
Compare only with the chart for that brand and model.
Use age only as a secondary cross-check when the manufacturer publishes it.

The fit check that matters most

Nike says a shin guard should run from just above the bend of the ankle when the foot flexes to a couple of inches below the knee. Put the exact model on as its instructions show, including its sleeve, strap, or sock setup.

Have the player bend the knee, jog, stop, and change direction. The guard should remain centered without contacting the knee or ankle. If it rotates or slides, recheck the model's size and retention system instead of assuming that tighter socks will fix the length.

Illustrated soccer shin guard centered below the knee and above the ankle, with a movement check. — Match the exact model's chart, then check shin coverage and free knee and ankle movement.

Ankle guards versus slip-in guards

Some models include an ankle section or straps; others use a removable shield with a sleeve or sock. That construction choice does not replace the size chart, and it should not be selected from age alone.

Follow the model's wear instructions and confirm the complete setup stays centered during movement. Ask the coach or program whether it has equipment requirements beyond the competition rule.

What size shin guards for a 12-year-old?

There is no brand-independent size for a 12-year-old. On Nike's cited kids' chart, age 12 appears in Large at 55-59 inches. On adidas' cited guidance, a 12-year-old can overlap Medium or Large depending on shin length and height.

Measure first and keep the size only if the exact guard clears the knee and ankle and remains centered through a squat, jog, stop, and cut. Recheck after several practices because the wear setup can loosen.

Parent checklist

Open the chart for the exact model

Record standing height and any requested shin measurement

Put on the complete sleeve, strap, and sock setup

Check clearance above the ankle bend and below the knee

Squat, jog, stop, and cut to check centering

Return a size that slides, rotates, pinches, or contacts a joint

Frequently asked questions

What size shin guards for a 12-year-old?

There is no universal size. Nike's cited kids' chart places age 12 in Large at 55-59 inches, while adidas overlaps Medium and Large at age 12 depending on measured shin length and height. Use the exact model chart.

What size shin guards for an 8-year-old?

Age 8 appears in different ranges across current brand guidance. Measure height and any shin length requested by the exact model, then verify that the guard clears the knee and ankle and stays centered.

What size shin guards for a 10-year-old?

Nike's cited kids' chart places age 10 in Large, while another brand can use a different system. The exact model's height or shin-length chart and the movement check decide.

Should shin guards cover the ankle?

Some models include an ankle section and others stop above the ankle bend. Follow the exact model's instructions; the hard shield should not crowd the ankle joint or contact the knee.

Can shin guards be too big?

Yes. A guard that contacts the knee or ankle, rotates, or slides during movement may be too long, too wide, or mismatched to the retention setup. Recheck the exact chart and model instructions.

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