+4
Spenco
RX Comfort Insoles
Unisex
Our Price
$17.00
Shoe Size Chart
Women's Shoe Size Conversion
| US & Canada | 10 | 10.5 | 11 | 11.5 | 12 | 4 | 4.5 | 5 | 5.5 | 6 | 6.5 | 7 |
| AU | 7 | 7.5 | 8 | 8.5 | 2 | 2.5 | 3 | 3.5 | 4 | |||
| UK | 8 | 8.5 | 9 | 9.5 | 10 | 2 | 2.5 | 3 | 3.5 | 4 | 4.5 | 5 |
| Europe | 40-41 | 41 | 41-42 | 42 | 42-43 | 35 | 35 | 35-36 | 36 | 36-37 | 37 | 37-38 |
| Inches | 10.2 in | 10.3 in | 10.5 in | 10.7 in | 10.9 in | 8.5 in | 8.3 in | 8.5 in | 8.8 in | 8.9 in | 9.1 in | 9.3 in |
| Centimeters | 25.9 cm | 26.2 cm | 26.7 cm | 27.1 cm | 27.6 cm | 20.8 cm | 21.3 cm | 21.6 cm | 22.2 cm | 22.5 cm | 23 cm | 23.5 cm |
Men's Shoe Size Conversion
| US & Canada | 10 | 10.5 | 11 | 11.5 | 12 | 13 | 14 | 15 | 16 | 6 | 6.5 |
| AU | 9 | 9.5 | 10 | 10.5 | 11 | 12 | 13 | 14 | 15 | 5 | 5.5 |
| UK | 9.5 | 10 | 10.5 | 11 | 11.5 | 12.5 | 13.5 | 14.5 | 15.5 | 5.5 | 6 |
| Europe | 43 | 43-44 | 44 | 45-45 | 45 | 46 | 47 | 48 | 49 | 39 | 39 |
| Inches | 10.6 in | 10.8 in | 10.9 in | 11.1 in | 11.3 in | 11.6 in | 11.9 in | 12.2 in | 12.5 in | 9.3 in | 9.5 in |
| Centimeters | 27 cm | 27.3 cm | 27.9 cm | 28.3 cm | 28.6 cm | 29.4 cm | 30.2 cm | 31 cm | 31.8 cm | 23.5 cm | 24.1 cm |
Big Kids' Shoe Size Conversion (7–12 Years)
| US & Canada | 3.5 | 4 | 4.5 | 5 | 5.5 | 6 | 6.5 |
| AU | |||||||
| UK | 2.5 | 3 | 3.5 | 4 | 4.5 | 5 | 5.5 |
| Europe | 35 | 36 | 36 | 37 | 37 | 38 | 38 |
| Inches | 8.6 in | 8.8 in | 9 in | 9.1 in | 9.3 in | 9.5 in | 9.6 in |
| Centimeters | 21.9 cm | 22.2 cm | 22.9 cm | 23.2 cm | 23.5 cm | 24.1 cm | 24.4 cm |
Little Kids' Shoe Size Conversion (4–7 Years)
| US & Canada | 1 | 1.5 | 10.5 | 11 | 11.5 | 12 | 12.5 | 13 | 13.5 | 2 | 2.5 | 3 |
| AU | ||||||||||||
| UK | 13 | 14 | 9.5 | 10 | 10.5 | 11 | 11.5 | 12 | 12.5 | 1 | 1.5 | 2 |
| Europe | 32 | 33 | 27 | 28 | 29 | 30 | 30 | 31 | 31 | 33 | 34 | 34 |
| Inches | 7.8 in | 8 in | 6.6 in | 6.8 in | 7 in | 7.1 in | 7.3 in | 7.5 in | 7.6 in | 8.1 in | 8.3 in | 8.5 in |
| Centimeters | 19.7 cm | 20.3 cm | 16.8 cm | 17.1 cm | 17.8 cm | 18.1 cm | 18.4 cm | 19.1 cm | 19.4 cm | 20.6 cm | 21 cm | 21.6 cm |
Toddlers' Shoe Size Conversion (9 Months–4 Years)
| US & Canada | 10 | 3.5 | 4 | 4.5 | 5 | 5.5 | 6 | 6.5 |
| AU | ||||||||
| UK | 27 | 19 | 19 | 20 | 20 | 21 | 22 | 22 |
| Europe | 9 | 2.5 | 3 | 3.5 | 4 | 4.5 | 5 | 5.5 |
| Inches | 6.5 in | 4.3 in | 4.5 in | 4.6 in | 4.8 in | 5 in | 5.1 in | 5.3 in |
| Centimeters | 16.5 cm | 10.8 cm | 11.4 cm | 11.7 cm | 12.1 cm | 12.7 cm | 12.7 cm | 13.3 cm |
About this product
Built for high-impact training and demanding workouts, this insole delivers stability where it matters most.
Rigid arch support helps keep movement aligned and supported through every stride.
Ideal for everyday performance or recovery, it brings lasting comfort to active routines.
Comfort & Performance
- Rigid arch support for enhanced stability
- Helps relieve plantar fasciitis-related discomfort
- Reduces strain linked to foot, leg, and back pain
- Designed for serious athletic performance
Design & Materials
- Structured support profile for maximum control
- Performance-focused construction for long wear
- Built to fit seamlessly into athletic footwear
Spenco Size Chart
General Shoe Conversion Chart - Women's
| US & Canada | 4 | 4.5 |
5 | 5 | 6 | 6.5 | 7 | 10 | 10.5 | 11 | 11.5 | 12 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| AU | 2 | 2.5 | 3 | 3.5 | 4 | 7 | 7.5 | 8 | 8.5 | |||
| UK | 2 | 2.5 | 3 | 3.5 | 4 | 4.5 | 5 | 8 | 8.5 | 9 | 9.5 | 10 |
| Europe | 35 | 35 | 35-36 | 36 | 36-37 | 37 | 37-38 | 40-41 | 41 | 41-42 | 42 | 42-43 |
| Inches | 8.5 in | 8.3 in | 8.5 in | 8.8 in | 8.9 in | 9.1 in | 9.3 in | 10.2 in | 10.3 in | 10.5 in | 10.7 in | 10.9 in |
| Centimeters | 20.8 cm | 21.3 cm | 21.6 cm | 22.2 cm | 22.5 cm | 23 cm | 23.5 cm | 25.9 cm | 26.2 cm | 26.7 cm | 27.1 cm | 27.6 cm |
General Shoe Conversion Chart - Men's
| US & Canada | 6 | 6.5 |
10 | 10.5 | 11 | 11.5 | 12 | 13 | 14 | 15 | 16 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| AU | 5 | 5.5 | 9 | 9.5 | 10 | 10.5 | 11 | 12 | 13 | 14 | 15 |
| UK | 5.5 | 6 | 9.5 | 10 | 10.5 | 11 | 11.5 | 12.5 | 13.5 | 14.5 | 15.5 |
| Europe | 39 | 39 | 43 | 43-44 | 44 | 45-45 | 45 | 46 | 47 | 48 | 49 |
| Inches | 9.3 in | 9.5 in | 10.6 in | 10.8 in | 10.9 in | 11.1 in | 11.3 in | 11.6 in | 11.9 in | 12.2 in | 12.5 in |
| Centimeters | 23.5 cm | 24.1 cm | 27 cm | 27.3 cm | 27.9 cm | 28.3 cm | 28.6 cm | 29.4 cm | 30.2 cm | 31 cm | 31.8 cm |
General Shoe Conversion Chart - Big Kids' (7–12 Years)
| US & Canada | 3.5 | 4 | 4.5 | 5 | 5.5 | 6 | 6.5 |
| UK | 2.5 | 3 | 3.5 | 4 | 4.5 | 5 | 5.5 |
| Europe | 35 | 36 | 36 | 37 | 37 | 38 | 38 |
| Inches | 8.6 in | 8.8 in | 9 in | 9.1 in | 9.3 in | 9.5 in | 9.6 in |
| Centimeters | 21.9 cm | 22.2 cm | 22.9 cm | 23.2 cm | 23.5 cm | 24.1 cm | 24.4 cm |
General Shoe Conversion Chart - Little Kids' (4–7 Years)
| US & Canada | 1 | 1.5 | 2 | 2.5 | 3 | 10.5 | 11 | 11.5 | 12 | 12.5 | 13 | 13.5 |
| UK | 13 | 14 | 1 | 1.5 | 2 | 9.5 | 10 | 10.5 | 11 | 11.5 | 12 | 12.5 |
| Europe | 32 | 33 | 33 | 34 | 34 | 27 | 28 | 29 | 30 | 30 | 31 | 31 |
| Inches | 7.8 in | 8 in | 8.1 in | 8.3 in | 8.5 in | 6.6 in | 6.8 in | 7 in | 7.1 in | 7.3 in | 7.5 in | 7.6 in |
| Centimeters | 19.7 cm | 20.3 cm | 20.6 cm | 21 cm | 21.6 cm | 16.8 cm | 17.1 cm | 17.8 cm | 18.1 cm | 18.4 cm | 19.1 cm | 19.4 cm |
General Shoe Conversion Chart - Toddlers' (9 Months–4 Years)
| US & Canada | 3.5 | 4 | 4.5 | 5 | 5.5 | 6 | 6.5 | 10 |
| UK | 19 | 19 | 20 | 20 | 21 | 22 | 22 | 27 |
| Europe | 2.5 | 3 | 3.5 | 4 | 4.5 | 5 | 5.5 | 9 |
| Inches | 4.3 in | 4.5 in | 4.6 in | 4.8 in | 5 in | 5.1 in | 5.3 in | 6.5 in |
| Centimeters | 10.8 cm | 11.4 cm | 11.7 cm | 12.1 cm | 12.7 cm | 12.7 cm | 13.3 cm | 16.5 cm |
Shipping & Returns
No-sweat, free shipping & returns!
United States Orders
- Free shipping 3-5 days
- Free returns/exchanges
- Expedited 2-day shipping also available
International Orders
- Free shipping
- Hassle-free returns/exchanges
- Restocking fee applied
*Shipping within Continental US: 2-5 days. International shipping: 7-11 days. See shipping policy here.
**Shoes must be unworn. See return policy here.
***Price match guarantee does not apply to Clearance or Final Sale items. See details here.
Can't find your size? Put in a request with our sourcing team!More from Spenco
More you'll love
Quick Add to Cart
Quick Add to Cart
Quick Add to Cart
Why shop Shoe Deals Outlet?
Best Prices
SDO finds incredible, only-here deals on your favorite brands.
Price Matching
Proudly American
Our American customer service team is here to help.
Talk to us
Quick Free Shipping
With US-based warehouses, most shoes arrive within 3-5 days.
See ship policies
Free US Returns
Our easy, free return process makes online shoe shopping simple.
See return policies
Black / Blue
- Black / Blue
Men's 6-7 / Women's 7-8
- Men's 6-7 / Women's 7-8
- 8-9
- Men's 10-11 / Women's 11-12
