To find out the size of a piercing you want, you have to consider 3 measurements: the width of the bar, the diameter and the diameter of the ball.
For example, for a hoop with 2 balls you have to measure the interior diameter of the hoop and the width of the bar itself. To measure these accurately you need a caliper.
On our website you will see measurements such as: 1.2x8x3. The first number corresponds to the width of the bar, the second to the diameter of the piece and the third refers to the diameter of the ball. Click to view video.
In other cases like with the ear plugs and the expanders, you only need to consider the diameter. Click to view video.
With earrings, you just need to measure the size of the ball, stone, gem etc.