Ring Size Calculator (Australia)

Here's a comprehensive table of Australian ring sizes with all the essential information you need to know:

Australian Size	Inside Diameter (mm)	Inside Circumference (mm)	US Size	UK Size
H	14.65	46.02	3 3/4	H
I	15.04	47.25	4 1/4	I
J	15.40	48.38	4 5/8	J
K	15.80	49.64	5 1/8	K
L	16.10	50.58	5 1/2	L
M	16.51	51.87	6	M
N	16.92	53.16	6 1/2	N
O	17.35	54.51	7	O
P	17.75	55.76	7 1/2	P
Q	18.19	57.15	8	Q
R	18.61	58.47	8 5/8	R
S	19.10	60.00	9 1/8	S
T	19.51	61.29	9 5/8	T
U	20.02	62.89	10 1/4	U
V	20.32	63.84	10 5/8	V
W	20.94	65.78	11 3/8	W
X	21.18	66.54	11 5/8	X
Y	21.49	67.51	12	Y
Z	21.89	68.77	12 1/2	Z

Key Points to Remember

1. Measurement Methods: You can measure your ring size by using an existing ring or measuring your finger directly1.
2. Timing: Measure your finger size at the end of the day, as fingers tend to shrink and expand throughout the day1.
3. Specific Finger: Ensure you measure the finger you intend to wear the ring on, as sizes may differ between fingers and hands1.
4. Between Sizes: If you're between sizes, it's generally recommended to size up1.
5. Ring Style: The style of the ring can impact the fit. Wider bands may feel tighter than thinner ones1.
6. Women's Sizes: Standard women's ring sizes typically fall into three categories: small (I-M), medium (N-Q), and large (R-U)5.
7. Men's Sizes: Men's rings are usually at the larger end of the scale, although this can vary5.
8. International Conversion: Australian ring sizes use letters, while other countries may use different systems. For example, the US uses numbers2.
9. Professional Sizing: For the most accurate sizing, especially for important purchases like engagement rings, it's best to visit a jeweler for a professional measurement15.

Remember, getting the right ring size is crucial for comfort and to prevent loss. When in doubt, consult with a professional jeweler for the most accurate sizing.