How to Measure Your Ring Size at Home



Try the easy methods to make sure your ring fits perfectly, every time.

▶︎ Best Practices for Finding Your Size

Before you measure your ring size, there are a few pointers to keep in mind:

  • Consider your knuckle: If you know your knuckle is on the larger side, order half a size bigger than what your finger alone indicates, otherwise you won't be able slide a ring into the right place.


  • Ensure accuracy with multiple tries: we recommend measuring your finger three to four different times because the size fluctuates depending on temperature: It can be smaller the colder you are and more swollen if you're overheated.


▶︎ Measurement Methods

Below are common (and easy) ways to measure your ring size at home—using string, a ring size chart, and a ring sizer—so you can get the right piece of jewelry.


Option 1: Use a piece of string, floss, paper, or tape to measure your finger. 


  1. Take a length of string, floss, paper or tape and wrap it around the base of your finger.
  2. Mark the point of first overlapping with a pen.
  3. Measure the length of string, floss, paper or tape to get your finger circumference.
  4. Use the ring size chart below to compare your measurement to the standard ring sizes, which go up by 0.4 millimeters every half-size.


    For instance, a size 3 ring is 14 mm, a size 3.5 ring is 14.4 mm, and a size 4 is 14.8mm. The most common ring sizes for women are 6 (16.5 mm), 6.5 (16.9mm), and 7 (17.3 mm), while the most common men's sizes are 10 (19.8mm), 10.5 (20.2 mm), and 11 (20.6 mm).

    Pro Tip: String and floss can stretch, so don't pull them too taut. If you do, your measured ring finger size may be larger than your finger and any rings you purchase may be too big.




    Option 2: Use Your Own Ring Sizer

    If you are under pressure to use one of the above methodologies, you can purchase your own ring measuring tool to ensure accuracy. 





    Japan Size
    US Size
    4 3
    5 3.5
    6 3.5-4
    7 4-4.5
    8 4.5-5
    9 5
    10 5.5
    11 6
    12 6.5
    13 6.5-7
    14 7-7.5
    15 7.5-8
    16 8
    17 8.5
    18 9
    19 9.5
    20 10
    21 10-10.5
    22 10.5
    23 11
    24 11.5
    25 12
    26 12.5
    27 13