Moderate Arch Support Insoles — MILD 31mm for Mild Flat Feet

MILD MODERATE SUPPORT 31MM MEDIAL ARCH

Moderate Arch Support Insoles — MILD 31mm for Mild Flat Feet

$35.99

$35.99 $52.99 -32% OFF

31mm moderate medial arch profile

2mm medial lift for mild flat feet or slight overpronation

Built for standing, walking, commuting, and daily shoe wear

Clinically Tested & Podiatrist Recommended

Gender Men's Women's

Select Quantity:

Select Your Sizing:

Select Your Shoe Size:

Size Guide

SIZE	US Men	US Women	UK/AUS	EUR	Length (mm)
XS	4 - 5.5	6 - 7.5	3 - 4.5	36 - 38	245
S	6 - 7.5	8 - 9.5	5 - 6.5	39 - 41	260
M	8 - 9.5	10 - 11.5	7 - 8.5	41 - 43	275
L	10 - 11.5	12 - 13.5	9 - 10.5	43 - 45	290
XL	12 - 13.5	14 - 15.5	11 - 12.5	45 - 48	310

*If you are between sizes, we recommend sizing up.

*All insoles can be trimmed to match your shoe size.

Size Comparison

90 Day Guarantee

Built for mild flat feet

Fits in 97% of shoes

Choose LOW+ 29mm if your arch sits low or nearly flat when standing. If your arch has some visible curve, MILD 31mm may feel more natural. NORMAL 33mm is for typical arches, while HIGH 35mm is for high arches.

StepAlign uses trim-to-fit edges and is designed for most sneakers, boots, work shoes, trainers, and casual footwear. Remove your original shoe insole first, then trim StepAlign gradually using it as a guide.

If you are between sizes, choose the larger size and trim gradually. The insole should sit flat inside the shoe without curling at the toe or heel.

StepAlign insoles are designed for daily shoe comfort and arch support. They are not intended to diagnose, treat, cure, or prevent any disease. For persistent foot pain or injury, consult a licensed medical professional.

StepAlign insoles are built for 12+ months of regular daily use. Actual lifespan depends on body weight, shoe type, activity level, and how often the same pair is worn.

Tracked & insured worldwide shipping. Estimated delivery: 4–16 business days. A tracking number will be sent to your email once your order ships.

We stand behind every pair. Try StepAlign risk-free for 90 days — if you're not satisfied for any reason, contact us and we'll make it right. No questions asked.

StepAlign has helped 5,000+ customers feel more supported in daily shoes.

Customer feedback reflects individual comfort and fit experiences. Individual results vary.

Daily Foot Comfort

Arch Support Feel

Running Shoe Support

Foot Alignment Support

Standing Comfort

Heel Stability Feel

Impact Cushioning

Step-by-Step Support

MILD · Mild Flat Feet

Engineered for Moderate Medial Arch Support

MILD 31mm is built for adults whose arch has some visible curve but still needs moderate medial support inside everyday shoes.

StepAlign MILD uses a 31mm moderate arch profile with a 2mm medial lift to create steady support under mild flat feet. The arch shell helps the foot feel more aligned inside the shoe, while the cushion core, shaped heel area, and trim-to-fit edge help the insole work across sneakers, work shoes, boots, and casual footwear.

Choose MILD 31mm →

See our 500+ verified reviews ★ Trustpilot

Who is MILD 31mm designed for?

StepAlign MILD 31mm is designed for adults with mild flat feet or slight overpronation who want moderate medial arch support inside everyday shoes. The 31mm profile includes a 2mm medial lift, helping the foot feel more evenly supported during standing, walking, and daily movement. MILD sits between LOW+ 29mm and NORMAL 33mm in the StepAlign lineup, making it a good option for feet with some visible arch curve but less structure than a typical arch. It uses a moisture-wicking top layer, moderate arch shell, cushion core, shaped heel area, and trim-to-fit edges for sneakers, work shoes, boots, and casual footwear. StepAlign insoles are daily comfort and shoe-fit support products, not medical correction devices. Individual fit and comfort results vary.

Before

After

Built for Everyday Foot Comfort

Customer feedback reflects individual comfort and fit experiences. Individual results vary.

95%

Reported Daily Comfort: Per StepAlign internal consumer testing, wearers reported improved everyday comfort with regular use. Individual results vary.

94%

Improved Shoe Fit Feel: Designed to make sneakers, work shoes, boots, and casual footwear feel more supportive under mild flat feet.

90%

More Balanced Step Feel: The 31mm profile and 2mm medial lift help the foot feel more evenly supported during daily movement.

* Results according to clinical/consumer studies.

Recommended by Podiatry & Sports Medicine Professionals

"As a general practitioner, I regularly see patients struggling with flat feet, overpronation, and chronic foot pain that affects their whole posture. StepAlign's tiered arch support system is exactly what I look for — biomechanically sound, properly graded by foot type, and built to last. I recommend it to patients before they consider expensive custom orthotics."

Dr. Emily Vance
General Practitioner · GP
Canada

Built for All Purposes

Nurses

Runners

Teachers

Security Guards

Sales Managers

Waiters

Construction Workers

Athletes

Older Adults

Arch Support Insoles FAQ

Who should choose MILD 31mm?

MILD 31mm is designed for adults with mild flat feet or slight overpronation who want moderate medial arch support during standing, walking, and daily shoe wear.

How do I know if I have mild flat feet?

If your wet footprint shows some arch curve but still looks flatter than typical, MILD 31mm is usually the right starting point. If your arch is almost fully flat, LOW+ 29mm may feel better.

What does the 2mm medial lift do?

The 2mm medial lift adds gentle support along the inside of the foot. It is designed to help the foot feel more evenly supported during daily standing and walking.

Is MILD 31mm good for standing all day?

Yes. MILD 31mm is built for daily standing, walking, commuting, and work shifts where moderate arch support feels better than a flat insole.

How is MILD different from NORMAL 33mm?

MILD 31mm is designed for mild flat feet and includes a 2mm medial lift. NORMAL 33mm is a balanced profile for typical adult arches and walking or running activity.

	LOW+ Severe Flat Feet	LOW Mild Flat Feet	MED Normal Arches	HIGH High Arches
Arch height	29mm 1.1"	31mm 1.2"	33mm 1.3"	35mm 1.4"
Support level	Firm	Moderate	Balanced	Max
Medial lift	+6.5mm	+6mm	+4mm	+4mm
Lateral base	4mm	4mm	4mm	+6mm
Correction	← Inward rolling	← Inward rolling	↕ Neutral	→ Outward rolling
Best for	Severe flat feet · heavy overpronation · X/O legs	Mild flat feet · standing all day · shin splints	Normal arches · running · gym · daily comfort	High arches · plantar fasciitis · supination
	View LOW+ →	✓ You are here	View MED →	View HIGH →