Brazilian to US Ring Size Converter: Complete Chart

Q: How do I convert Brazilian ring size to US size?

To convert Brazilian to US size, use the conversion chart provided. Brazilian sizes 8-12 roughly correspond to US 4-6, sizes 13-18 to US 7-9, sizes 19-24 to US 10-12, and sizes 25-35 to US 13 and larger. For precise measurements, use a ring sizer tool or measure the inner diameter.

Q: Is Brazilian ring sizing accurate for online purchases?

Brazilian sizing is quite accurate since it's based on actual circumference measurements. However, always compare with the seller's sizing chart, as some Brazilian jewelers may have slight variations. Consider ordering a sizer ring first if purchasing an expensive piece.

Understanding the Brazilian Ring Sizing System

The Brazilian ring sizing system is one of the most logical and measurement-based sizing systems in the world. Unlike the US system which uses arbitrary letters and numbers, the Brazilian system is based directly on the inner circumference of the ring measured in millimeters. Each size increases by approximately 1mm in circumference.

Brazilian ring sizes start at size 8 (smallest) and go up to size 35 (largest). Size 8 corresponds to approximately 47mm in inner circumference, while size 35 reaches about 74mm. This makes the Brazilian system incredibly easy to understand and convert to actual measurements.

The Brazilian sizing system is used not only in Brazil but is also common throughout South America and is recognized internationally. Many high-end jewelers and luxury brands use Brazilian sizing standards, making it important to understand this system if you're shopping for rings from Brazilian retailers.

Brazilian to US Ring Size Conversion Chart

The comprehensive table below shows the conversion between Brazilian ring sizes and US, EU, UK, and other international sizing systems, along with exact circumference and diameter measurements:

Brazilian Size	Circumference (mm)	Diameter (mm)	US Size	EU/ISO Size	UK Size
8	47.0	14.97	4	44	H 1/2
9	48.0	15.29	4.5	45	I
10	49.0	15.61	5	46	J
11	50.0	15.92	5.5	47	K 1/2
12	51.0	16.24	6	48	L 1/2
13	52.0	16.56	6.5	49	M 1/2
14	53.0	16.88	7	50	N 1/2
15	54.0	17.19	7.5	51	O 1/2
16	55.0	17.51	8	52	P 1/2
17	56.0	17.83	8.5	53	Q 1/2
18	57.0	18.15	9	54	R 1/2
19	58.0	18.46	9.5	55	S 1/2
20	59.0	18.78	10	56	T 1/2
21	60.0	19.10	10.5	57	U 1/2
22	61.0	19.42	11	58	V 1/2
23	62.0	19.73	11.5	59	W 1/2
24	63.0	20.05	12	60	X 1/2
25	64.0	20.37	12.5	61	Y 1/2
26	65.0	20.69	13	62	Z
27	66.0	21.01	13.5	63	Z+1
28	67.0	21.33	14	64	Z+2

How to Measure Your Ring Size Using Brazilian Standards

If you have a ring that fits you well, measuring it to find your Brazilian size is straightforward. Using a ruler or measuring tape, measure the inside circumference of your ring in millimeters. Once you have this measurement, simply add 1.0 to 1.5mm for a comfortable fit (rings should slide over your knuckle but not spin easily on your finger).

For example, if your current ring's circumference is 57mm, your Brazilian size would be approximately 18. The additional 1-1.5mm accounts for the fact that your knuckle is typically slightly larger than the base of your finger where the ring normally sits.

You can also use the Ring Sizer app, which provides an accurate method to determine your ring size using your iPhone's camera. Simply follow the app's instructions to get a precise measurement that works across all sizing systems.

Tips for Buying Rings from Brazil

When shopping for rings from Brazilian jewelers or retailers, keep these important tips in mind:

Always check the seller's size chart: While Brazilian sizing is standardized, some artisanal jewelers may have slight variations. Always verify the conversion with the specific seller.
Measure your existing rings: Have multiple rings you love and use their measurements as reference points. This helps ensure consistency across different purchases.
Consider ordering a sizer ring: Many Brazilian jewelers offer inexpensive plastic or metal sizer rings. For significant purchases, this small investment can save you from ordering the wrong size.
Account for ring width: Wider rings tend to feel tighter, so you might want to size up by half a size if buying a very wide band. The conversion chart assumes standard width rings.
Check return policies: Reputable Brazilian jewelers offer sizing exchanges. Always clarify the return policy before purchasing.
Order during consistent times: Your fingers swell slightly during hot weather and after exercise. Measure and order when your hands are at their normal state.

Brazilian vs. US Ring Sizing: Key Differences

The Brazilian sizing system differs significantly from the US system in several important ways. The US system uses letters (A-Z+) and numbers in a non-linear fashion, while the Brazilian system uses sequential numbers based on actual circumference measurements. This makes Brazilian sizing much more intuitive and easier to understand at a glance.

Additionally, the Brazilian system is more precise because it's based on direct measurements. A US size 9 can vary slightly between manufacturers, but a Brazilian size 18 is always the same circumference. This standardization makes it easier to shop across different Brazilian jewelers and retailers with confidence.

For international shoppers, understanding both systems is crucial. Many luxury brands source their gemstones from Brazil but sell globally using their own sizing systems. Knowing your Brazilian size gives you a universal reference point for any international jewelry purchase.

Converting Between Brazilian and Other International Sizes

Brazilian sizes can be converted to virtually any international sizing system. Here's a quick reference for common conversions:

Brazilian to EU/ISO: Brazilian size + 36 = EU size (approximately). For example, Brazilian 18 + 36 = EU 54.
Brazilian to Circumference (mm): Brazilian size + 39 = circumference in mm. For example, Brazilian 18 = 57mm.
Brazilian to US: Use the conversion chart provided above for most accurate results, as the relationship is not linear.
Brazilian to UK: Refer to the comprehensive chart above, as UK sizes don't follow a mathematical formula relative to Brazilian sizing.

FAQ About Brazilian Ring Sizes

What is the Brazilian ring sizing system?

The Brazilian ring sizing system is based on the inner circumference of the ring measured in millimeters. Sizes range from 8 (approximately 47mm) to 35 (approximately 74mm), with each size increasing by about 1mm in circumference. This makes it one of the most measurement-based and logical sizing systems worldwide.

How do I convert Brazilian ring size to US size?

Use the conversion chart provided above for the most accurate results. Generally, Brazilian sizes 8-12 correspond to US 4-6, sizes 13-18 to US 7-9, sizes 19-24 to US 10-12, and sizes 25-35 to US 13 and larger. For precise conversions, measure the circumference of your ring and use the detailed chart.

Is Brazilian ring sizing accurate for online purchases?

Yes, Brazilian sizing is highly accurate because it's based on actual measurements. However, always compare with the seller's specific sizing chart, as some artisanal jewelers may have slight variations. For expensive pieces, consider ordering a sizer ring first to confirm the fit.

What's the difference between Brazilian and US ring sizes?

Brazilian sizes are based on circumference measurements and use sequential numbers (8-35), while US sizes use a non-linear letter/number system. Brazilian sizing is more directly related to actual measurements, making it easier to understand the physical dimensions of a ring.

Can I use my Brazilian ring size for jewelry shopping in other countries?

Yes! Your Brazilian size can be converted to any international sizing system using the charts provided. Many luxury international brands recognize Brazilian sizing as a standard reference. Always verify the conversion with the specific retailer to ensure accuracy.

How should I measure my finger for Brazilian sizing?

Measure the inner circumference of a well-fitting ring using a ruler or measuring tape in millimeters. For determining your own size without a ring, use the Ring Sizer app for accurate measurements. Remember to add 1-1.5mm to account for your knuckle when measuring an existing ring.

Related Conversion Tools and Guides

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