# Mandrels and ring sizers

> The ring mandrel is a graduated steel cone for curving and measuring rings; there are also bangle mandrels and finger sizers.

- Source: https://www.711grados.com/en/mandrels-and-ring-sizers/
- Language: en
- Note: This entry was drafted with the help of AI and is pending review by the author.
- Published: 2026-08-23
- Updated: 2026-08-26
- Translation (es): https://www.711grados.com/es/mandriles-y-calibres-de-anillo/
- Author: Sandra Sánchez
- Site: 711 Grados (https://www.711grados.com/)

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A mandrel is a steel form over which a piece is curved or fitted. The ring one is a cone graduated in sizes.

## Ring mandrel

A steel cone with a scale (in EU or US sizes). It is used to curve the band, check its size and round it after soldering.

## Finger sizer

A set of sample rings (sizers) used to measure the customer's finger. See [how to find your size](https://www.711grados.com/en/how-to-find-your-ring-size/).

## Other mandrels

Bangle (oval), pendant and for making rings and spirals.

## Use

Strike the metal over the mandrel with a rawhide mallet so as not to mark it.

## How to use the ring mandrel

Slide the band onto the thin end as far as it fits and check the size on the engraved scale. To **round a band** after soldering, tap it with a rawhide mallet while turning it on the mandrel; never with a metal hammer.

## Bangle mandrels and others

The bangle mandrel is oval and is used to shape bangles and cuffs. Pendant mandrels are round and tapered; **coiling mandrels** have different diameters for making jump rings and springs.

## Measuring the finger

Finger sizers are sample rings of each size. Measure at the end of the day, with the finger at normal temperature, and check that the sizer passes the knuckle with a little resistance. See [how to find your size](https://www.711grados.com/en/how-to-find-your-ring-size/).

## See also

- [Bending, curving and twisting metal](https://www.711grados.com/en/bending-curving-and-twisting/)
- [Ring resizing](https://www.711grados.com/en/ring-resizing/)
- [How to find your ring size (with conversion chart)](https://www.711grados.com/en/how-to-find-your-ring-size/)