Ring Size by Paper Strip Tool
Measure your finger with a thin strip of paper, enter the marked overlap length, and convert that DIY measurement into US, EU, and VN ring size references. This tool belongs to the Size & Measurement category and works especially well when you do not have an existing ring to measure.
If you already have a ring in hand, compare the result with the Ring Size Calculator. If you already know one market standard and only need chart-to-chart translation, open the Ring Size Converter. For bracelet fit after ring sizing, move to the Bracelet Size Calculator before opening the bracelet designer.
Ring Size by Paper Strip Tool
Wrap a thin paper strip around the finger, mark where it overlaps, then enter that strip length here to convert the measurement into US, EU, and VN ring sizes.
Reference-style sizing chart
Use the strip steps and the marked-length diagram together, so the measuring method and the size conversion stay in one place.
Paper Strip in MM
Your size is
7
Step 1
Cut a thin strip of paper about 6 to 8 mm wide.
Step 2
Wrap it around the finger base where the ring will sit.
Step 3
Mark the overlap point, then flatten the strip and measure that length.
How to read the strip
Flatten the marked strip and read the overlap length as the base circumference before comfort allowance is added.
Drag to adjust
5.38 cm
Keep the strip flat against the skin. Do not pull so tightly that the paper buckles or digs into the finger.
Mode
Paper strip
Measured strip
53.8 mm
Converted ring
7 / O / Ni 17.3
US Size
7
UK Size
O
EU Size
54
JP Size
14
VN Size
Ni 17.3
Estimated Diameter
17.3 mm
Estimated Circumference
54.4 mm
How the paper strip conversion works
The strip length gives a finger circumference. The tool adds a small allowance based on the fit you want and the band width you plan to wear, then converts that adjusted circumference into the nearest standard ring size row.
Standard fit aims for an everyday wearable result without adding too much extra room.
Adjusted circumference used for the final conversion: 54.4 mm.
Reference Chart
Common US, UK, EU, JP, and VN ring size chart
US American | UK British | Diameter (mm) Inner | EU European | JP Japanese | VN Vietnamese |
|---|---|---|---|---|---|
| 3 | F 1/2 | 14.1 | 44 | — | Ni 14.1 |
| 3.5 | G | 14.5 | 46 | 5 | Ni 14.5 |
| 4 | H 1/2 | 14.9 | 47 | 7 | Ni 14.9 |
| 4.5 | J | 15.3 | 48 | 8 | Ni 15.3 |
| 5 | K | 15.7 | 49 | 9 | Ni 15.7 |
| 5.5 | L | 16.1 | 51 | 11 | Ni 16.1 |
| 6 | M | 16.5 | 52 | 12 | Ni 16.5 |
| 6.5 | N | 16.9 | 53 | 13 | Ni 16.9 |
| 7 | O | 17.3 | 54 | 14 | Ni 17.3 |
| 7.5 | P | 17.7 | 56 | 15 | Ni 17.7 |
| 8 | Q | 18.2 | 57 | 17 | Ni 18.2 |
| 8.5 | R | 18.6 | 58 | 18 | Ni 18.6 |
| 9 | S | 19.0 | 60 | 19 | Ni 19.0 |
| 9.5 | T | 19.4 | 61 | 20 | Ni 19.4 |
| 10 | U | 19.8 | 62 | 21 | Ni 19.8 |
| 10.5 | V | 20.2 | 63 | 23 | Ni 20.2 |
| 11 | W | 20.6 | 65 | 24 | Ni 20.6 |
| 11.5 | X | 21.0 | 66 | 25 | Ni 21.0 |
| 12 | Y | 21.4 | 67 | 27 | Ni 21.4 |
| 12.5 | Z | 21.8 | 68 | 28 | Ni 21.8 |
| 13 | Z+1 | 22.2 | 70 | 29 | Ni 22.2 |
Related ring tools
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How the paper strip method becomes a ring size
A paper strip measurement is really a finger circumference. Once you wrap the strip around the finger and mark where the paper overlaps, the measured strip length gives the finger circumference directly.
This tool converts that strip length into millimeters if needed, adds a small allowance based on your chosen fit and band width, then compares the adjusted circumference against a standard ring size chart. The closest chart row becomes the suggested US size, with matching EU and VN references shown beside it.
Use this method when you are sizing from scratch at home. If you want a second opinion, compare the result with the Ring Size Calculator or move to the Ring Size Converter to translate the final size across different shopping markets.
Everyday fit
Paper strip 5.38 cm · standard fit · standard band
US 7 · EU 54 · VN Ni 17.3
Gift check
Paper strip 4.93 cm · snug fit · slim band
US 5 · EU 49 · VN Ni 15.7
Wide band
Paper strip 6.13 cm · standard fit · wide band
US 10 · EU 62 · VN Ni 19.8
FAQ
Paper strip ring sizing questions
Is a paper strip accurate enough for ring sizing?
It can be accurate enough for a first estimate if the strip stays flat, the overlap mark is clear, and the final strip length is measured carefully. It is still better to double-check with a physical ring or jeweler if the purchase is expensive or the band is very wide.
Should I add extra room for a wide ring band?
Usually yes. Wider bands cover more skin and often feel tighter than slim bands. That is why this tool adds extra allowance when you select a wide band before converting the strip measurement into a standard size.
What if I measured the strip in centimeters instead of millimeters?
That is fine. The tool accepts millimeters, centimeters, and inches, then converts the strip length into the same circumference-based ring size chart before showing the US, EU, and VN references.
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