Dildo Firmness Ratings Explained: What Shore Hardness Really Means

Translate the Specification First

What Is Shore Hardness?

Shore hardness is a way of measuring how strongly a material resists indentation.

A durometer uses a spring-loaded indenter against the material. The resulting reading is reported on a specific Shore scale.

ASTM D2240 covers multiple durometer types—including A, D and OO—for rubber, elastomeric, gel-like and some plastic materials.

This distinction matters for dildos because shoppers often use hardness, firmness, flexibility and stiffness as if they all mean exactly the same thing.

They do not.

Why Are There Different Shore Scales?

One measurement range cannot conveniently describe everything from extremely soft gels to hard plastics.

That is why multiple Shore scales exist.

The Biggest Mistake: Comparing the Number Without the Scale

This is similar to comparing 30 degrees Celsius with 30 degrees Fahrenheit.

The number looks identical while the scale changes its meaning.

Shore scales can overlap in parts of their ranges, but that does not make the raw numbers interchangeable. Smooth-On's technical chart explicitly illustrates that different Shore scales overlap while remaining distinct scales.

A Shore Rating Measures Material—Not the Whole Dildo Experience

This is where the specification becomes especially easy to misuse.

Imagine that two dildos are made from silicone with the same reported durometer hardness.

They can still behave differently as complete products.

The Shore rating gives you information about the first box.

It does not automatically answer the other three.

Same Silicone Hardness, Different Shaft

This is why “Which Shore hardness feels most realistic?” does not have one universal answer.

The finished geometry matters too.

Hardness, Flexibility and Stiffness Are Related—but Not Identical

A product page that gives only a Shore rating therefore gives you useful information—but not a complete mechanical description.

Dual Density Makes One Number Even Less Complete

If a seller advertises a dual-density dildo, look for information about which part is soft and which part provides support.

For the construction difference itself, read Dual Density vs Single Density Dildos .

Silicone Can Exist Across Very Different Hardness Ranges

The word “silicone” does not represent one fixed firmness.

Commercial silicone manufacturers offer formulations across dramatically different durometer values. Smooth-On's silicone lineup, for example, includes very soft Ecoflex products rated on the Shore 00 scale as well as substantially firmer silicones rated on Shore A.

These are industrial/material examples, not recommendations for dildo construction.

They simply demonstrate why a silicone specification needs both the number and the Shore scale.

Can You Tell Shore Hardness From a Product Photo?

A photograph can demonstrate behavior qualitatively.

It cannot replace an actual hardness specification.

That is why the Realistic Dildo Product Photo Guide treats softness as one of the features photographs cannot reliably quantify.

What if a Product Page Says Only “Soft Silicone”?

That description can still be useful—but it is relative and subjective.

“Soft” may mean:

A Shore rating gives you a more technical reference point when it is provided correctly.

But a useful product page should ideally combine that rating with a plain-English description of how the dildo is constructed.

What if Two Brands Use Different Firmness Descriptions?

One brand may use:

Soft / Medium / Firm.

Another may publish:

Shore 00-30 / 00-50 / 10A.

A third may describe:

soft skin + firm core.

Do not force all three systems into a fake universal comparison if the necessary technical data is missing.

Compare the information each brand actually provides.

Four Firmness Shortcuts That Do Not Work

For the last point, see What Does Platinum-Cure Silicone Mean? .

Which Shore Hardness Is Best for a Realistic Dildo?

There is no single number that can be declared best for every realistic dildo.

The answer depends on what the manufacturer is trying to create.

Does a Lower Shore Rating Always Feel Better?

No.

A very soft material can provide substantial compression, but that does not mean every shopper wants the entire shaft built from the softest possible material.

A dildo also needs whatever amount of shape retention and structural support its design requires.

This is why layered constructions exist: softness and support do not always have to come from the same material zone.

If your actual decision is about the experience of soft versus firm silicone, the more relevant article is Soft vs Firm Silicone Dildos .

What About Long or Thick Dildos?

Geometry becomes especially important as dimensions change.

A long shaft creates more leverage from the base.

A thick shaft contains more material across its cross-section.

So two products made from silicone with a similar hardness rating can still behave noticeably differently if one is long and slender while the other is short and thick.

This is another reason not to build a universal chart saying:

“X Shore = X feeling.”

The complete dildo needs to be considered.

What Does Shore Hardness Tell You About Texture?

Less than many shoppers assume.

A dildo can use the same broad firmness level while having:

subtle veins, pronounced veins, a smooth shaft, a sharply defined head or a relatively rounded head.

Durometer hardness describes the material's resistance to indentation.

It does not describe how much anatomical texture was sculpted into the mold.

That is a separate design decision.

How Does This Fit With Realistic Feel?

Shore hardness is useful because material compression is one part of realistic feel.

But realistic feel is multi-variable.

You also need to consider:

surface texture, shaft geometry, weight, head shape, internal support and layering.

Our What Makes a Dildo Feel Real? guide looks at those variables together rather than reducing realism to one hardness value.

How to Read a Dildo Firmness Specification Correctly

A Better Way to Compare Firmness

Suppose you are choosing between two realistic silicone dildos.

Instead of asking:

“Which has the lower Shore number?”

ask:

Are the ratings on the same scale?

Are they describing the same structural layer?

Are the shafts similar in diameter and length?

Is one dual density while the other is not?

Does one contain an internal support structure?

Only after those questions are answered does the numeric comparison become much more meaningful.

Why Good Product Pages Should Include Both Technical and Plain Language

For most shoppers, “Shore 00-30” is not immediately intuitive.

But “very soft” alone is vague.

The strongest product description uses both:

Technical: Shore 00-30.

Plain language: soft, highly compressible outer silicone.

Then it explains the construction:

Structure: soft exterior with a more supportive internal core.

Now the shopper understands far more than any one label could communicate.

So, Is Shore Hardness Worth Paying Attention To?

Yes—when it is reported clearly.

It is one of the few ways a product page can give you a standardized technical reference for material indentation hardness rather than relying entirely on words such as soft, supple or firm. ASTM D2240 provides the standardized durometer framework behind these types of measurements.

But the number should remain one specification among several.

It cannot replace:

material identification, geometry, dual-density information, internal construction, weight or a useful explanation of how the finished dildo is designed.