Does raw denim shrink in the wash?

Unsanforized raw denim can shrink noticeably in the first wash. Most raw jeans sold today are sanforized, meaning preshrunk, which the product page generally states.

How often should jeans be washed?

Jeans should be washed rarely, inside out and at low temperature, to preserve the color and the fabric. Airing the jeans between wears is often enough.

Raw or Washed Denim: Which to Choose for Jeans That Last

Q: Raw or washed denim, which to choose?

Raw denim has not been washed after dyeing: it is stiffer at first, develops a patina with wear and needs few washes. Washed denim is washed or treated before sale: it is soft right away, but these treatments already weaken the fabric. For longevity, raw wins; for immediate comfort, washed.

In short:
Raw denim has had no wash after dyeing, while washed denim is treated before sale.
Raw denim develops a patina with wear and keeps an intact fabric longer.
Unsanforized denim can shrink in the first wash.
In both cases, washing rarely, inside out and cold extends the life of the jeans.

Two ways to finish denim

Denim is a twill-weave fabric whose warp threads are dyed with indigo and whose weft threads are left ecru. Raw denim is sold as is after weaving and assembly. Washed denim goes through washes or treatments (stones, enzymes, abrasion) that lighten the color and soften the fabric.

Comparing wear over time

Criterion	Raw denim	Washed denim
Initial comfort	Stiff	Soft
Evolution	Develops a patina depending on movement	Color already set
Fabric resistance	Intact	Already stressed
Care	Rare washes	Regular washes

The shrinkage question

Sanforization is a process that preshrinks the fabric. Unsanforized raw jeans are therefore chosen slightly bigger, as specialist brands specify.

Caring for them properly

Washing jeans inside out and at low temperature limits indigo loss. Drying flat or hung avoids the thermal shock of the tumble dryer. The same principles apply to delicate fibers, as shown in the article on how to wash wool.

Where they fit in a wardrobe

Straight raw jeans are one of the timeless wardrobe essentials. They pair with a dressier pair of wide-leg trousers for women to cover most occasions.