Laundry Symbols on Clothes: A Complete Guide

Clothing care labels are standardized internationally, but most people recognize only a handful of the symbols — and guess at the rest. Understanding the full system means you can follow the manufacturer's actual instructions instead of estimating, which is how delicate items get ruined.

This guide covers every major laundry symbol category with clear explanations and the practical decisions they lead to.

The System: How Laundry Symbols Work

Care symbols are based on the ISO 3758 international standard. Each symbol represents one care process: washing, drying, ironing, bleaching, and dry cleaning. Modifications within each category use additional lines, dots, or numbers. An X through any symbol always means that process should be avoided entirely.

Washing Symbols (Washtub Shape)

Machine wash symbols

• Plain washtub — machine wash; no temperature restriction specified
• Washtub with number (30, 40, 60, etc.) — machine wash at maximum that temperature in °C. A 30 means up to 30°C (cold wash); 40 means up to 40°C (warm); 60 means up to 60°C (hot)
• Washtub with one underline — permanent press/synthetic cycle (medium agitation)
• Washtub with two underlines — delicate/gentle cycle (minimum agitation)

Hand wash symbols

• Washtub with hand — hand wash only; do not machine wash. Use cool or lukewarm water and handle gently

Do not wash

• Washtub with X through it — do not wash with water at all; usually means dry clean only

Drying Symbols (Square Shape)

Tumble dryer symbols

• Square with circle inside — can be tumble dried
• Square with circle, one dot — tumble dry on low heat
• Square with circle, two dots — tumble dry on medium heat
• Square with circle, three dots — tumble dry on high heat
• Square with circle and X — do not tumble dry; must air dry

Natural/line drying symbols

• Square with horizontal line in center — dry flat (lay horizontally); typically for wool and knits that would stretch if hung
• Square with curved line at top — line dry or hang to dry
• Square with three vertical lines — drip dry; hang while wet and allow to drip without wringing
• Square with lines and half-circle shading — dry in shade; avoid direct sunlight (which can fade colors)

Ironing Symbols (Iron Shape)

• Iron with one dot — iron on low temperature (up to 110°C); suitable for synthetics
• Iron with two dots — iron on medium temperature (up to 150°C); suitable for wool and silk
• Iron with three dots — iron on high temperature (up to 200°C); suitable for cotton and linen
• Iron with lines through the bottom vents — do not use steam
• Iron with X — do not iron at all

Bleaching Symbols (Triangle Shape)

• Plain triangle — any bleach can be used
• Triangle with CL inside — chlorine bleach (regular bleach) can be used
• Triangle with two diagonal lines — only non-chlorine/oxygen bleach; do not use chlorine bleach
• Triangle with X — do not bleach at all

Dry Cleaning Symbols (Circle Shape)

• Plain circle — dry clean; the specific solvent is at the cleaner's discretion
• Circle with letter (A, F, P, W) — indicates which cleaning solvents are safe. The cleaner understands these codes; you just need to note which letter appears
• Circle with one underline — dry clean with gentle/sensitive process
• Circle with X — do not dry clean

Practical Decision Chart

The Most Common Label Combinations

Cotton T-shirt: 40 in washtub, circle-in-square with 2 dots, iron with 2 dots

Wool sweater: Hand wash symbol or 30 in washtub with 2 underlines, X on circle-in-square (no dryer), dry flat symbol

Suit jacket: Circle (dry clean), iron with 2 dots, triangle with X (no bleach)

Synthetic blouse: 30 or 40 in washtub with 1 underline, circle-in-square with 1 dot (low heat dryer), iron with 1 dot

Frequently Asked Questions

What does a 30 on the label mean?

A washtub with 30 inside means machine wash at a maximum of 30°C — which is a cold wash. This is common for delicate fabrics, dark colors, and items that might shrink or fade at higher temperatures.

What happens if I ignore the care label?

For mild deviations (washing at 40°C instead of 30°C), the effect is usually minor over a few washes. For significant deviations (machine washing something labeled "hand wash only" or putting a "no dryer" item in the dryer), the result can be permanent damage: shrinking, felting, distortion, fading, or fabric breakdown.

Why do some garments have no care label?

Older garments may have had labels removed (some people cut them out for comfort). Very small items may have abbreviated labels. If there's no label, treat the garment according to its fiber content: natural fibers (cotton, wool, linen) are sensitive to heat; synthetics (polyester, nylon) are heat-sensitive in different ways; silks and delicates get cold water and gentle handling.

The Bottom Line

The key symbols to recognize: the washtub temperature (°C), the underlines for cycle type, the X for "do not," the square/circle combination for dryer settings, and the dot count on the iron. Understanding these covers the majority of care decisions for most garments in your wardrobe.

For specific fabric washing guidance, see washing wool sweaters and washing cashmere.