Most jewelers have ring size charts available as well as assorted tools to determine ring size either from an existing ring or by measuring the appropriate finger. If the engagement ring is a surprise, however, taking your beloved into a jewelry store and asking to measure her finger is not the most subtle or secretive approach. There are a number of ring size charts available online, either to convert measurements or to compare against existing rings.

Printable ring sizer

Fingers can change size throughout the day, and proper measurements are crucial to obtain an accurate size for the engagement ring. For the best measurements, follow these tips:

• If the finger joints are prominent, either measure the widest part of the finger or use a printed comparison chart with a well-fitting ring for the best measurement.
• Fingers change size according to temperature, time of day, and even humidity. For the best fit, take measurements at room temperature (not after showering, being outdoors in the winter, vigorous exercise, etc.) and toward the end of the day (when the fingers are typically largest).
• A woman’s finger size can change during her menstrual cycle, growing slightly larger if she retains water. Be careful not to obtain a measurement during that time, which could result in a ring that will be loose most of the month.
• If the measurement is between two potential sizes, choose the larger size to be sure it will fit.
• Measure in millimeters for a more accurate size.

Accurate ring size measurements are especially crucial for more elaborate rings such as eternity rings or bridal sets, which are difficult and expensive to resize because of their intricacy. Furthermore, if the ring will be engraved, appropriate sizes are also important.

Picture from fancyjewelry.com

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