![](http://cdn.shopify.com/s/files/1/1962/0451/files/size_img_1_1400x.png?v=1497353921)
Step 1: Get An Erection
You'll need to be fully erect to accurately measure your size and ensure that you choose the correct Bathmate size.
![](http://cdn.shopify.com/s/files/1/1962/0451/files/size_img_1_1400x.png?v=1497353921)
![](http://cdn.shopify.com/s/files/1/1962/0451/files/size_img_5_1400x.png?v=1497353921)
Step 2: Measure Your Length
Measure your erect penis length with a ruler lightly pressed onto your pubic bone, recording from the bone to the penis tip.
![](http://cdn.shopify.com/s/files/1/1962/0451/files/size_img_5_1400x.png?v=1497353921)
![](http://cdn.shopify.com/s/files/1/2130/9459/files/girth_temp2.png?839416971067816830)
Step 3: Measure Your Girth
Wrap a Measuring Gauge or piece of string around your penis, recording the full measurement of the circumference.
![](http://cdn.shopify.com/s/files/1/2130/9459/files/girth_temp2.png?839416971067816830)