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Bong Joint Size Guide – How To Measure Your Joint Size & Gender

One of the most important things to know when buying a new bong or bong accessories is the joint size and gender. While all of the bongs and dab rigs on our website come with their own bowl or nail, there may come a time when you want to upgrade your bong or rig and buy a new nail or bowl. This is when it’s important to know the joint size and gender you need to make it fit. We put together a quick bong joint size guide for quick reference and will explain in further detail below. This quick guide will show you how to measure your joint size or bowl size using only a dime!

Male Vs Female Joints

The first and most important thing to know when determining the right piece to buy is the joint gender. Bongs, bowls, nails, ash catchers, adapters, dropdowns, and all other bong parts have a gender, male or female. All you need to know is that male pieces go into female joints and female pieces go on top of male joints. So if your bong has a female joint you will need to buy a male jointed bowl or dab nail and vice versa.

What Gender Is My Bong Joint?

The image below shows you how to identify what gender your bowl or bong joint is. This is very simple if your joint is male it will use the same sized female accessories. If your joint is female, it will use the same sized male accessories.

Joint Sizes

Before you go buy a new bong bowl or nail you need to know the joint size of your bong or dab rig. Bong joint sizes come in three different sizes, 10mm, 14mm or 18mm. The most common joint size is 14mm, you will rarely see 10mm joints and 18mm joints are usually only find on the biggest sized bongs. If you see anyone mention 14.5mm or 18.8mm joints don’t get confused these are the same as 14mm and 18mm joints.

10mm Joint

Most often referred to as micro or nano joints, 10mm joints are usually only found on pendant rigs or the smallest dab rigs designed for extreme portability. A 10mm joint is easy to identify because it is extremely small.

14mm Joint

The most common of all joint sizes is 14mm. Almost all small-medium sized bongs and dab rigs have 14mm joints. To find out if your joint is a 14mm all you need is a dime. If the dime is about the same size as your joint its a 14mm. If the dime falls into the joint its an 18mm, and if the joint is much smaller than a dime you have a 10mm joint.

18mm Joint

Another common joint size, 18mm joints are usually only found on the largest bongs. This is to increase airflow since the piece is much larger. If a dime falls into your joint then you have an 18mm joint.

How To Measure Your Bong Joint Size Using A Dime

This is the quickest and easiest way to measure your bong joint size. For almost all bongs and dab rigs you only need to worry about two sizes: 14mm and 18mm. The image below shows you what your joint or bowl will look like compared to a dime. As you can see below the dime falls into the 18mm joint and sits on top of the 14mm joint. Using a dime is the easiest way to measure your bong joint and determine what size your bong joint is.

The image above also helps you determine the bowl size using a dime. A 14mm male bowl piece is about 3/4 of the size of a dime whereas an 18mm male bowl piece is almost the entire size of a dime.

To summarize: whatever gender joint you have, it will use the opposite gender and same sizes for its parts, bowls and accessories. If you make a mistake when buying a bong part you can always buy an adapter to make it work. Adapters are small glass pieces that can change the joint size and gender of your bong or dab rigs. Although, we know after you finish reading this bong joint size guide you will never make that mistake!

This quick guide will show you how to measure your bong joint using only a dime! Knowing the correct bong joint size and gender is crucial when buying new bong accessories, bowls, or dab nails.

Small Jail House Worked Tube Rig 10mm Female Joint by iDab Glass

Brand iDab Glass
Width 6.5cm
Height 14cm
joint size 14.5mm
Material Pyrex
Bong Type Beaker
Joint Female

The Small Jail House Worked Tube Rig is a great portable rig in the style of a beaker, traditionally more stable than straight-tube bongs because they have a larger base, it also features baked on decals on the stem and on the bottom of the base.

iDab was founded in 2012, and still to this day continues to lead the way in innovation and flawless production in the most sought after designs for the consumption of concentrates out of their workshop in So Cal, California.

Handmade in U.S.A, the crew over at iDab may be small but what they don’t lack in is experience with each glass peice made to order using only the highest quality in German Schott Glass, known for its durability, scratch resistance, improved thermal shock resistance (hot to cold, and vice versa), ease of cleaning and chemical and solvent resistance along with stunning optical clarity.

  • German Schott Glass
  • Jail House
  • 10mm Female Joint
  • Glass Decals
  • Weight: 111g Approx
  • Height: 13cm Approx
  • Base Diameter: 4.5cm Approx
  • As a custom, each peice may vary slightly

Small Jail House Worked Tube Rig 10mm Female Joint by iDab Glass The Small Jail House Worked Tube Rig is a great portable rig in the style of a beaker, traditionally more stable than straight-tube bongs because they have a larger base, it also features b ]]>