Top-view of bare feet on patterned carpet illustrating natural foot changes over time

Why Do Feet Change Size? Guide to Measuring & Picking the Perfect Slipper

Swollen during pregnancy, wider after lockdown workouts, or suddenly tighter in the evening—do feet change size? Absolutely. This guide explains why, shows you how to measure feet at home, and helps you choose CP Slippers that still fit tomorrow.

  1. Main reasons feet change size
  2. Measure your feet in 60 sec
  3. When to re-measure
  4. Buying tips for CP Slippers
  5. FAQ

1. Why Do Feet Change Size? 4 Key Causes

Pregnancy & Hormones

Relaxin—yes, that’s the hormone’s real name—loosens ligaments so baby can pass the pelvis. It also softens the foot’s arch, making length and width increase up to 0.5 cm. Swelling adds extra volume late in the day.

Weight Gain or Loss

More kilos flatten the longitudinal arch; losing kilos lets it spring back. Expect width differences first, length next.

Age & Arch Collapse

From your 40s onward, collagen decreases. The arch lowers and toes may splay, adding up to half a size over a decade.

Daily Swelling & Health Conditions

Heat, long standing, salt, or circulatory issues can make feet expand by up to one full size by evening—reason enough to measure at the end of the day.


2. How to Measure Feet at Home (60-Second Method)

  1. Place a sheet of paper flush against a wall.
  2. Stand barefoot, heel touching the wall, weight even.
  3. Mark the longest toe with a pencil.
  4. Measure wall-to-mark in centimetres.
  5. Add 1 cm if you’re buying leather slippers—room for natural stretch.

Compare the final number with our CP Slippers Size Chart. Repeat for the other foot; always buy for the larger measurement.


3. When Should I Re-Measure?

  • Pregnancy: each trimester & three months postpartum.
  • Weight change: after ±5 kg sustained for 3+ months.
  • Age milestones: every five years after 40.
  • Evening tightness: if shoes feel snug after 6 p.m.

4. Buying Tips for CP Slippers

Leather hugs the foot over time, so if you’re between numbers choose the larger. For swelling (pregnancy, heat):

Find Your Perfect Size → Shop CP Slippers

5. FAQ

Do feet change size permanently after pregnancy?
Roughly 60 % of women keep a half-size increase post-pregnancy due to arch lowering.

Can losing weight make shoes feel loose?
Yes—fat pads in the arch shrink, so width often decreases first.

Is it safer to buy slippers larger?
One centimetre extra is ideal. Too large can cause trips; too tight limits circulation.
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