Dildo Size Guide - How to Get the Right Length and Width: A Visual Guide

Dildos come in every size from the demure beginner probe to the 12 inch whopper. Making the right choice about what will work for your body can be overwhelming but don’t worry, Betty is here to help pick the perfect dildo for you.

When choosing a dildo, there are 4 metrics you need to consider:

1. Length
2. Insertable Length
3. Width
4. Girth

These are 4 distinct measurements. Usually the general rule of thumb is, the longer the dildo, the greater the width (and girth), but that's not always the case.  You can have short, thick dildos, and very long skinny dildos. 

1. DILDO LENGTH 

When dildo manufacturers list their products, they use the overall length. What that means is from top to bottom (from tip to base).  If the dildo has balls, or a suction cup, that is included in the overall length.

2. INSERTABLE LENGTH

This is the measure of how much of a dildo you can insert in your body. Since many dildos have ball and suction cups, these take away from the insertable length of a dildo. An 8" dildo (length) might only have a 5" or 6" insertable length.

INSERTABLE LENGTH = LENGTH - SUCTION CUP/BALLS

The difference between length and insertable length can be seen in this handy video tutorial 

3. DILDO WIDTH

Manufacturers generally measure the width of a dildo rather than the circumference (or girth). To give you a great comparison, here is a visual of how dildo width translates to the average can of soda.

As illustrated below, keep in mind that the average penis is 1.5 inches wide. A lot of dildos are much larger, so keep that in mind before you purchase something too big.

4. DILDO GIRTH

Dildo girth is a measure of the circumference of the dildo.  The girth is directly related to the width: the wider the dildo, the greater the circumference (remember Grade 8 math?) 

Width is probably an easier measurement to use, since it's easier to picture how big a 2" wide dildo would be, but how big is a dildo with a 6.5" girth?

CONCLUSION

Not sure which size dildo is for you?  If you're a beginner, we recommend starting out with a smaller dildo that's more similar to an average size penis.

Click here to browse or smaller dildos under 7" in length

If you've used dildos before and feel like you're ready for something a little larger, you can browse our larger dildos (8" or more) here.

To learn even more about dildos, here is another good video demonstrating different sized dildos.

And, be sure to read our Complete Guide to Dildo Materials.