Medically reviewed by Dr. Tom Biernacki, DPM
Board-certified podiatric surgeon | Balance Foot & Ankle, Howell & Bloomfield Hills, MI
Last reviewed: May 2026
Quick answer: When Do Feet Stop Growing is a common foot/ankle topic that affects many patients. The 2026 evidence-based approach combines proper diagnosis, conservative-first treatment, and escalation only when needed. We treat this regularly at our Howell and Bloomfield Hills practices. Call (810) 206-1402.
The most important clinical decision with When Do Feet Stop Growing isn’t which treatment to start with — it’s identifying the correct subtype. That changes everything. Call (810) 206-1402.
When Do Feet Stop Growing: Quick Answer
Feet typically stop growing in length around age 14 in girls and age 16 in boys, coinciding with the closure of the growth plates in the long bones. However, foot WIDTH and FLATTENING can continue throughout life — pregnancy adds 1/2 to a full size permanently in 60-70% of women due to relaxin hormone loosening the ligaments and gradually flattening the arch, and aging causes a similar arch collapse and width increase from accumulated wear on the ligaments and tendons. So while your shoe size in length stops changing in the late teens, you may need a half-size or full-size larger and wider shoe at age 50 than you wore at age 25 — even though your feet didn’t technically “grow.”
When Foot Length Growth Actually Stops
Foot length growth follows the same pattern as height growth — controlled by the growth plates (epiphyseal plates) in the long bones of the foot, ankle, and lower leg. These growth plates close at the end of puberty.
Girls: Foot growth typically completes by age 13-14 (about 2 years after the start of menstruation). Most girls reach their adult shoe size by 14.
Boys: Foot growth completes by age 15-16. Some boys continue growing until age 18.
Final foot length: Average adult foot length is 9.6 inches for women (US shoe size 7-8) and 10.6 inches for men (US shoe size 9-10). Foot length is moderately heritable — your final adult foot size is usually within 1 size of your same-sex parent.
Why Pregnancy Permanently Changes Foot Size
During pregnancy, the hormone relaxin loosens ligaments throughout the body — designed to allow the pelvis to expand for childbirth. Unfortunately, relaxin doesn’t selectively act on the pelvis — it loosens ligaments in the feet too, allowing the arch to gradually flatten under increased body weight.
A 2013 study in The American Journal of Physical Medicine & Rehabilitation found that 60-70% of women have a permanent increase in foot length and width after their first pregnancy. The average increase is 0.18 to 0.32 inches in length (about 1/2 shoe size) and 0.10 to 0.20 inches in width.
Subsequent pregnancies typically don’t cause additional growth — the changes happen primarily during the first pregnancy.
Aging and Foot Size: Why You’re a Size Larger at 60
Aging causes gradual flattening of the arch (acquired flatfoot) and a parallel increase in foot length and width — even without pregnancy. The cause is accumulated micro-trauma to the posterior tibial tendon (the main arch supporter), gradual ligament loosening, and atrophy of the fat pad on the bottom of the foot.
Most adults need to size up 1/2 to a full size between age 30 and age 60-70. Many seniors don’t realize this and continue wearing shoes that became too small over time, contributing to bunions, hammertoes, and pressure ulcers.
Recommendation: Have your feet measured every 5-10 years (especially after age 40) at a professional shoe store using a Brannock device. Measure both feet — they’re often different sizes. Buy shoes that fit your larger foot.
Why Children’s Feet Need Frequent Re-Measurement
Children’s feet grow rapidly — toddlers can outgrow shoes in 2-3 months, school-age children in 3-4 months, and teenagers in 4-6 months. Always have children’s feet measured at the shoe store rather than guessing by age.
Signs that a child’s shoes are too small: red marks on the toes after wearing; the child takes off shoes immediately upon returning home; toenails getting thick or blackened; the child stops wanting to wear the shoes; toes pressed against the front of the shoe (check by pressing the front of the shoe with your thumb).
Don’t buy too big either: shoes more than 1/2 size too large cause friction blisters and gait abnormalities. The right fit is thumb-width space between the longest toe and the front of the shoe.
Conditions That Affect Foot Size in Adults
Acromegaly: Excess growth hormone (usually from a pituitary adenoma) causes the hands, feet, and facial features to enlarge in adulthood. Patients often notice ring sizes increasing or shoe sizes growing in their 30s-40s. Treatment of the underlying tumor stops further growth but doesn’t reverse changes.
Lymphedema: Chronic swelling of the foot from lymphatic dysfunction can give the appearance of foot enlargement. Compression therapy and manual lymphatic drainage are mainstays of treatment.
Charcot foot (in diabetics): Severe neuropathy can lead to bone destruction and foot deformity that increases foot size and changes shape. Requires immediate immobilization and podiatric care to prevent amputation.
Posterior tibial tendinopathy progressing to flatfoot: The tendon that supports the arch can fail in adulthood, causing a “fallen arch” and an increase in foot length and width. See our PTTD brace guide.
Should You Re-Measure Your Feet?
Yes — most adults are wearing the wrong shoe size. Have your feet measured at a professional shoe store using a Brannock device. Measure both feet (they’re often different sizes — buy for the larger). Re-measure every 5-10 years, after pregnancy, after significant weight gain or loss, and if you’ve developed any foot pain.
At Balance Foot & Ankle in Howell and Bloomfield Hills MI, we provide complimentary foot measurement and shoe fitting consultation as part of any biomechanical or orthotic evaluation. Same-week appointments at (810) 206-1402.
When Shoes Aren’t Enough — Dr. Tom’s Top 9 Orthotics
About 30% of patients I see for foot pain need MORE than a great shoe — they need a structured insole. Below: my complete 2026 orthotic ranking with pros, cons, and the specific patient I’d give each one to.
In-Office Treatment at Balance Foot & Ankle
If home treatment isn’t providing relief for your foot pain, our podiatry team at Balance Foot & Ankle can help with same-day evaluations and advanced in-office care.
Frequently Asked Questions About When Do Feet Stop Growing
At what age do feet stop growing?
Girls: typically by 14. Boys: typically by 16. Foot LENGTH stops growing in the late teens. Foot WIDTH and FLATTENING can continue throughout life from pregnancy and aging.
Do feet keep growing after 16?
Foot LENGTH is essentially complete by 16-18 (girls earlier than boys). But foot width can increase throughout life from pregnancy, aging, weight gain, or arch collapse — many adults need to size up 1/2 to 1 full size between age 30 and 60.
Why are my feet bigger than they used to be?
Most commonly: pregnancy (relaxin hormone permanently loosens ligaments), aging (gradual arch flattening), weight gain (heavier load flattens the arch), or posterior tibial tendinopathy (fallen arch).
Do feet keep growing during pregnancy?
Yes — about 60-70% of women have a permanent foot size increase (1/2 to 1 full size) after their first pregnancy due to relaxin hormone loosening foot ligaments and the arch flattening under increased weight.
Why are my child’s feet growing so fast?
Normal — children’s feet grow rapidly. Toddlers may outgrow shoes in 2-3 months, school-age children in 3-4 months. Always have children’s feet measured rather than guessing by age.
Can adult feet grow back to normal after pregnancy?
Most pregnancy-related foot enlargement is permanent. Custom orthotics can support the dropped arch and prevent further flattening but won’t shrink the foot back to pre-pregnancy size.
How do I know if my shoes are too small?
Pinch test: press the front of the shoe with your thumb — there should be thumb-width (about 1/2 inch) space between your longest toe and the front of the shoe. Other signs: blackened toenails, frequent blisters, calluses on the side of the foot.
Related Resources from Balance Foot & Ankle
- Podiatrist Recommended Shoes
- Best Shoes for Wide Feet
- Best Shoes for Flat Feet
- Posterior Tibial Tendinopathy
- Best Orthotics for Flat Feet
Frequently Asked Questions
When should I see a podiatrist?
If symptoms persist past 2 weeks, affect your normal activity, or are accompanied by red-flag symptoms (warmth, redness, swelling, inability to bear weight).
What does treatment cost?
Most diagnostic visits and conservative treatments are covered by Medicare and major insurers. Out-of-pocket costs vary by your specific plan.
How quickly can I get an appointment?
Most non-urgent cases see us within 5 business days. Urgent cases (sudden pain, possible fracture) typically same or next business day.
APMA: Foot Development and Growth Milestones
Ready to Get Relief?
Same-day appointments available in Howell & Bloomfield Hills, MI
4.9★ | 1,123 Reviews | 3,000+ Surgeries
Or call: (810) 206-1402
Dr. Tom Biernacki, DPM is a board-certified foot & ankle surgeon (ABFAS & ABPM) at Balance Foot & Ankle Specialists in Southeast Michigan. With over a decade of clinical experience, he specializes in heel pain, bunions, diabetic foot care, sports injuries, and minimally invasive surgery. Dr. Biernacki is a member of the APMA and ACFAS, and his patient education content on MichiganFootDoctors.com and YouTube has made him one of the most-followed foot & ankle educators on YouTube.