







Sizing Chart
US | UK | EU | LENGTH (CM) |
---|---|---|---|
10C-11C | 9-10 | 27/28 | 17.5 |
12C-13C | 11 - 12 | 29/30 | 18.5 |
1Y | 13 | 31/32 | 21.5 |
2Y | 1-1.5 | 33/34 | 22.5 |
3Y-4Y | 2-3 | 35/36 | 23.5 |
5Y 6Y | 4-5 | 37/38 | 24.5 |
6.5Y 7Y | 5.5-6 | 39/40 | 25.5 |
M8 / W9 | 7 | 41/42 | 26.5 |
M9/W10 | 8 | 43/44 | 27.5 |
M10 / W11 | 9 | 45/46 | 28.5 |
M11 / W12 | 10 | 47/48 | 29.5 |
M12 / W13 | 11 | 49/50 | 30.5 |
M13/W14 | 12 | 51/52 | 31.5 |
M14 / W15 | 13 | 53/54 | 32.5 |
The insoles have cutting lines on the back. Cut these lines with scissors for a custom fit. If you're between sizes, choose the larger one.
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How Parents Are Loving Heelix™
More Than Relief
Heelix helps align overpronation and protect posture, allowing kids to walk, run, and grow with confidence.

Why Heelix™ Wins Every Time?
See how Heelix™ stacks up against generic insoles and costly orthotics
  | Heelix™ | Generic Insoles | Custom Orthotics |
---|---|---|---|
Align flat feet & overpronation |
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Relieves heel & arch pain |
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Doctor-inspired design |
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lasting 9–12 months |
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Fits any shoe (trim-to-fit) |
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Affordable & budget friendly |

Real Results. Real Parents
95%
Noticed their child walked pain-free within the first week
92%
Noticed fewer complaints of sore feet after school
88%
Saw improved posture and alignment after consistent use
*Individual results vary, quotes are parent reports through surveys and testimonials.
Quick Questions? Try These...
How fast will my child feel relief?
How fast will my child feel relief?
Some parents report noticeable difference in
alignement within the first wear, and less complaints about sore heels
and foot pains in the first week of consistent use. Others see changes
over the next couple weeks. Individual results may vary.
Will they fit in my child’s existing shoes?
Will they fit in my child’s existing shoes?
Absolutely. Heelix™ Insoles are slim, lightweight, and trim-to-fit, so they slide easily into sneakers, school shoes, and even sports cleats without bulk.
My child grows fast. Won’t they outgrow these quickly?
My child grows fast. Won’t they outgrow these quickly?
Each pair is designed to last 9–12 months of daily wear. With our trim-to-fit sizing, one pair adapts across shoe sizes, so your child gets maximum use.
Are these comfortable enough for kids to actually wear?
Are these comfortable enough for kids to actually wear?
Yes. Heelix™ Insoles use soft cushioning combined with breathable materials to keep feet comfortable all day. Parents tell us their kids forget they’re even wearing them.
How do these compare to $500 custom orthotics?
How do these compare to $500 custom orthotics?
Heelix™ offers support and alignment inspired by experts' input at an affordable price. Many parents find them effective — especially since children quickly outgrow custom orthotics.
Can they be trimmed or adjusted for the perfect fit?
Can they be trimmed or adjusted for the perfect fit?
Yes. Each insole can be easily trimmed at the edges for a custom fit inside any shoe, ensuring comfort and stability without slipping or bunching.
What if we don’t see results?
What if we don’t see results?
We stand behind Heelix™ with a 60-Day Satisfaction Guarantee. If you don’t see a difference in your child’s comfort and alignment, you can return them for a full refund.