CE Marking Rules Explained: Size, Shape & Placement

CE Mark Size, Shape, and Placement Rules: How to Apply the CE Mark Correctly (2025 Guide)

To sell a product on the European market, obtaining a CE certificate alone is not enough. The CE mark must also be applied correctly on the product in accordance with EU legislation.

Incorrect size, wrong proportions, poor placement, or non-permanent marking can cause a product to be deemed non-compliant, leading to fines, recalls, or market bans.

This guide explains how the CE mark must look, how big it should be, where it should be placed, and what the legal requirements are, based on current EU rules.

What Is the CE Mark and Why Is It Important?

The CE mark (Conformité Européenne) is a mandatory conformity marking indicating that a product complies with the European Union’s health, safety, and environmental protection requirements.

Correct CE marking is essential for:

Customs clearance in the EU
Market surveillance inspections
Selling on online marketplaces (Amazon, eBay, etc.)
Protecting consumer safety
Avoiding legal penalties

Incorrect CE marking may be treated as false or misleading conformity, sometimes confused with the illegal “China Export” logo.

Official Shape of the CE Mark (Legal Requirements)

The shape of the CE mark is strictly defined by the European Commission and must not be altered. The official CE symbol must meet these conditions:

The “C” is drawn as a precise semi-circle
The “E” has an open internal structure
Letter proportions follow a fixed geometric design

🚫 Letter thickness, spacing, or angles may not be changed.

🚫 Custom-designed CE logos are not allowed.

🚫 “China Export” symbols are illegal in the EU.

CE Mark Size Requirements

Minimum Size Rule

Minimum height: 5 mm – This is the smallest legally permitted size for the CE mark.

Scaling Rules

The CE mark may be enlarged or reduced
Proportions must remain exactly the same
Letter spacing and line thickness cannot be distorted

Exception for Small Products

If the product is too small to carry a 5 mm CE mark:

Place the CE mark on the packaging.
If that is not possible, place it in the user manual or accompanying documents.

How to Apply the CE Mark on a Product

1. The CE Mark Must Be Visible and Indelible

The CE mark must be applied using permanent methods, such as:

Laser marking
Engraving
Permanent printing
Durable, non-removable labels

❌ Easily removable stickers or temporary markings are not accepted.

2. Correct Placement on the Product

The CE mark should be placed in a clearly visible location, commonly:

On the product housing
On the nameplate or rating label
On the back or bottom of the product
Inside the battery compartment (if appropriate)

3. Alternative Placement When Necessary

For very small products, the CE mark may appear on:

The product packaging
The technical data sheet
The user instructions or manual

What Does the 4-Digit Number Next to the CE Mark Mean?

Some products require a Notified Body to be involved in conformity assessment. In these cases, a 4-digit identification number appears next to the CE mark.

Example: CE 1234 → Product assessed by Notified Body number 1234.

This number is mandatory for products such as: