Are All Safety Razor Blades the Same? It Depends on This

While using a safety razor tends to offer a closer and more refined shave, the process might lead you to think, “Are all safety razor blades the same?” The quick answer is no. Although they share a standardized size and should fit into any safety razor handle, various factors, including the material, coating, edge sharpness, and manufacturing process, differentiate them.

This raises another question: “Are safety razor blades universal?” Yes, the majority of safety razor blades are universal in their design. Many popular brands, such as Derby, Astra, and Wilkinson Sword, produce universal blades that are compatible with most safety razors.

Let’s delve into these differences and see how they can impact your shaving experience.

Comparison Table

To simplify, here’s a comparison table that shows some likely differences among safety razor blades:

SizeStandardized (43mm x 22mm)
MaterialStainless Steel, Carbon Steel
CoatingChrome, Platinum, Polymer, PTFE
Edge SharpnessVaries
Manufacturing ProcessStamped or ground

Size: Are All Safety Razor Blades the Same Size?

Safety razor blades maintain a standardized size of 43mm x 22mm, allowing them to fit in virtually all safety razors. Despite this, their thickness can vary among brands. Some may be thinner, leading to more blade flex and potentially a more aggressive shave, while others are thicker and offer more blade stability.

In other words, all safety razors use the same size blades, including the increasingly popular double-edged razor and traditional safety razors.


Most safety razor blades are made of stainless steel or carbon steel. Stainless steel blades are more durable, less prone to rust, and provide a smooth shave. Carbon steel blades, on the other hand, are incredibly sharp but may rust quickly if not properly cared for.


Safety razor blades may also differ based on their coating, which affects their performance and longevity. Common coatings include chrome, platinum, and polymer. These coatings can reduce shaving friction, prolong blade life, and even affect the sharpness of the blade edge. The platinum coat, for example, offers exceptional edge performance and rusting resistance – you’ll find this in the highly regarded Feather blades.

Edge Sharpness

The edge sharpness of safety razor blades can significantly impact the quality of your shave. Sharper blades like Feather are renowned for their closeness, whereas mild blades like Derby are known for their gentleness. Some people might prefer a double-edged razor blade for their versatility.

Manufacturing Processes

Safety razor blades are usually made using two primary processes—stamping and grinding. Stamped blades are cut from a sheet of steel, while ground blades are thinned down to the right thickness. The process chosen can affect the blade’s sharpness and consistency.

Shave cream or shaving soap can also contribute to a smooth shaving experience when used with safety razors, reducing the risk of razor bumps and ingrown hairs.

Here’s a terrific video demonstrating the manufacturing process of safety razor blades:

What About Single Edge & Injector Blades?

Single edge and injector blades are different than the standard double-edge safety razor blades. These blades have their own unique characteristics and are designed for specific razor types.

Single Edge Blades

Single edge (SE) blades have only one sharp edge instead of the standard two edges found on double-edge blades. They are longer than double-edge blades and are often thicker, providing more stability. SE blades are less common but are particularly useful for those with thick hair or who need a more aggressive shave. They usually fit in single edge, or “Gem-style” razors.

Injector Blades

Injector blades are even more specialized and designed to work with injector razors. Slightly narrower and longer than double-edge blades, they are easily loaded into the razor using an injector tool. Injector blades are known for providing a smooth, efficient shave. You’ll find these in vintage Schick or Personna injector razors. Modern brands include Supply and Razorock offering injector razors.

Matching Blade to Hair Type

When selecting a safety razor blade, it is essential to consider your hair type. Some blades may be more suitable for coarse hair, while others cater to finer hair. Choosing the right blade can greatly improve your shaving experience and reduce the occurrence of razor bumps. It is advisable to get a variety pack of blades to test out different brands and see which one works best for you.

Final Note

Even though safety razor blades share the same size and should be technically interchangeable across different safety razors, each blade isn’t the same and your shaving experience can differ substantially based on the blade you use.

About the author:

John Miller is a passionate wet shaving enthusiast, a pastime he has been devoted to for the past 7 years. A veteran of the trade, he has earned the reputation of being an meticulous advocate of traditional wet shaving. When John first got into the hobby, he read and researched the techniques extensively, often trying new blades and techniques, and now has an unparalleled knowledge of the best products, techniques, and tools available.

John is widely respected in the wet shaving community and is a trusted source of advice and reviews. He also contributes to several wet shaving forums, often discussing the finer points of traditional shaving.