An engagement ring size chart helps individuals choose the correct ring size for their engagement ring based on their finger measurements. Knowing the correct ring size ensures that the ring fits comfortably and securely on the finger without being too tight or too loose. Engagement rings are typically worn on the fourth finger (ring finger) of the left hand, but the sizing can vary depending on the person's finger and hand shape.

Engagement ring sizes are typically measured in US sizes, but many countries use other systems such as UK, European (EU), Japanese, and Canadian sizes. Most engagement rings come in whole and half sizes, but they can also be custom-made to specific measurements.

Engagement Ring Size Chart

US Size	Finger Circumference (inches)	Finger Circumference (mm)	Diameter (mm)	UK Size	EU Size
3	2.03 inches	51.5 mm	14.0 mm	F	44.0
3.5	2.08 inches	52.5 mm	14.3 mm	G	45.0
4	2.12 inches	54.0 mm	14.6 mm	H	46.0
4.5	2.17 inches	55.0 mm	14.9 mm	H½	47.0
5	2.22 inches	56.5 mm	15.2 mm	I	48.0
5.5	2.27 inches	57.5 mm	15.5 mm	J	49.0
6	2.32 inches	59.0 mm	15.8 mm	J½	50.0
6.5	2.37 inches	60.5 mm	16.1 mm	K	51.0
7	2.42 inches	62.0 mm	16.5 mm	L	52.0
7.5	2.47 inches	63.5 mm	16.8 mm	L½	53.0
8	2.52 inches	64.5 mm	17.1 mm	M	54.0
8.5	2.57 inches	65.5 mm	17.4 mm	M½	55.0
9	2.62 inches	67.0 mm	17.7 mm	N	56.0
9.5	2.67 inches	68.0 mm	18.0 mm	N½	57.0
10	2.72 inches	69.0 mm	18.3 mm	O	58.0
10.5	2.77 inches	70.0 mm	18.6 mm	O½	59.0
11	2.82 inches	71.5 mm	18.9 mm	P	60.0
11.5	2.87 inches	72.5 mm	19.2 mm	P½	61.0
12	2.92 inches	73.5 mm	19.5 mm	Q	62.0
12.5	2.97 inches	74.5 mm	19.8 mm	Q½	63.0
13	3.02 inches	75.5 mm	20.1 mm	R	64.0

How to Measure Your Finger for Engagement Ring Size:

1. Use a Ring Sizer:
   • You can buy a ring sizer (either a set of plastic rings or a measuring tape specifically designed for ring sizing) or visit a local jeweler to have your finger sized.
2. Measure Your Finger:
   • Use a flexible measuring tape and wrap it snugly around the base of your ring finger.
   • Ensure the measuring tape is comfortable and not too tight.
   • Record the measurement in millimeters (mm). If you don’t have a flexible tape, you can use a strip of paper and then measure its length using a ruler.
3. Compare the Measurement with the Chart:
   • Match your finger circumference with the closest measurement on the engagement ring size chart.
4. Use a Larger Size for Comfort:
   • Remember that fingers can swell throughout the day due to heat, activity, or water retention. If you’re between two sizes, it’s generally recommended to choose the larger size for comfort.

Tips for Choosing the Right Engagement Ring Size:

1. Consider the Ring Style:
   • Wide bands tend to feel tighter than narrow bands. If you're choosing a wide band, consider going up half a size for comfort.
2. Know the Temperature:
   • Your finger size can change with temperature. Your fingers are generally smaller in colder weather and larger in warmer weather. It's best to measure your finger when it’s at normal room temperature.
3. Allow for Comfort:
   • Rings should fit comfortably, meaning you should be able to slide it over the knuckle with a little resistance, but it shouldn’t be so tight that it causes discomfort.
4. Avoid Guessing:
   • While some people may know their size, it’s always best to get an accurate measurement rather than guessing. A jeweler can help you determine the right size if you’re unsure.

Engagement Ring Size Chart (For Other Countries):

UK Size Chart:

US Size	UK Size
3	F
3.5	G
4	H
4.5	H½
5	I
5.5	J
6	J½
6.5	K
7	L
7.5	L½
8	M
8.5	M½
9	N
9.5	N½
10	O
10.5	O½
11	P
11.5	P½
12	Q
12.5	Q½
13	R

European (EU) Size Chart:

US Size	EU Size
3	44.0
3.5	45.0
4	46.0
4.5	47.0
5	48.0
5.5	49.0
6	50.0
6.5	51.0
7	52.0
7.5	53.0
8	54.0
8.5	55.0
9	56.0
9.5	57.0
10	58.0
10.5	59.0
11	60.0
11.5	61.0
12	62.0