The science of erection size.
Let’s set the record straight – bigger doesn’t automatically mean better. (Just ask the 77% of women who find penis size either unimportant or totally unimportant).
Great, now that’s out of the way, let’s get back to it.
Contrary to popular belief, bigger erections aren’t just about genetics. Your erection size is driven by three key factors:
- Blood flow
- Vascular expansion
- Tissue elasticity
When these three elements are trained to be at their best, you can achieve fuller, harder, and more sustainable erections. And with the right approach – even long-term size gains.
So while it might not really matter, it’s nice to know you can affect the size of your erection.
How blood flow affects your erection.
Your erection is only as big as the amount of blood your penile chambers can hold. So it’s pretty simple; the more blood volume your erectile tissues can receive and retain, the larger and firmer you get.
Here’s how it works:
1️⃣ Your body opens the floodgates
When you’re aroused, your body releases a chemical called nitric oxide. This tells your blood vessels to relax and widen, allowing more blood to rush into your penis.
2️⃣ Your erection chambers stretch and fill
The corpora cavernosa (the two main chambers inside your penis) act like a sponge. They expand as they absorb more blood – which determines how big and firm your erection gets.
3️⃣ Your body locks in the blood
To stay hard, the veins that normally drain blood tighten up. This traps
the blood inside your erection chambers to keep things solid and long-lasting.
And here’s the part that makes long-term growth possible:
Tissue expansion for real growth
Just like muscle growth from weightlifting, controlled expansion creates small cellular stress – triggering new tissue growth.
More blood, bigger results
With regular training, your erection chambers adapt and expand, holding more blood for larger, firmer erections that last longer.
A stronger structure means more size
The tunica albuginea (the fibrous sheath surrounding your erection chambers) thickens and stretches – allowing even more expansion and making size gains last longer each time.
How Bathmate helps you get bigger erections.
If you want bigger, harder erections, you need to train your body to hold more blood and stretch further – and that’s exactly what Bathmate helps you do.
Bathmate’s hydropump technology uses the power of water pressure to safely and evenly expand the erectile tissues, increasing their ability to hold more blood.
The result?
Thicker, longer-lasting, and stronger erections.
It’s simple. But it works.
Why Bathmate is different?
Safe, even pressure
Unlike air pumps that create uneven suction (and potential tissue damage), Bathmate’s water-based system gives you a smooth, controlled expansion process.
Progressive size gains
Each session stretches and strengthens your erection chambers, helping them hold more blood. Over time, this leads to real, measurable size increases.
Instant & long-term results
After just one session, you’ll notice an immediate boost in girth and fullness. And with consistent use, you’ll build lasting size gains as your body adapts.
Works with your body, not against it
Bathmate is designed to complement your natural erection process, helping you perform at your best – each and every time.
When will I start seeing results?
It’s the question everyone is asking – but bigger, harder erections don’t happen overnight (but they do happen!).
From the first session, you’ll see an instant boost, and with regular use, those gains start to stick.
Want the full breakdown?
Want expert advice on getting bigger?
Size isn’t just about what you’re born with – it’s about what you do with it. Take your gains to the next level with our expert insights:
Losing girth? Here’s what it means and how to get it back naturally.
You’re not imagining it. And it’s not just in your head. A decrease in penile girth—especially during erection—is one of the most common (but least talked about) concerns men face over time.
Why your erections don’t feel as big as they used to (And what you can do).
Let’s talk about a quiet concern more men share than you might think: erections that don’t feel as full, thick, or firm as they used to. You’re not imagining it. And you’re definitely not alone.
Why girth gains matter more than you think.
When most guys think about penis enhancement, they focus on length. But here’s the truth: girth isn’t just as important—it’s often more important.
Bigger, Fuller, Thicker: What to expect in your first 30 days with Bathmate.
Think progress, not promises. When it comes to real results, consistency is king—and Bathmate’s hydro-based routine is built for just that.
Can You Actually Increase Penis Size Naturally? What the Science Says.
What does science actually say about natural penis enlargement? Let’s separate fact from fiction—and show you where Bathmate fits into the picture.
Pump your way to bigger, harder, stronger.
Explore our pumps.
