Printable ring sizer

Print the ring sizer at 100% scale

Blue Nile and VRAI both say to print a ring sizer at actual size, because a printer that scales the page makes every circle the wrong size. The sizer above is drawn in millimeters, so it prints at true size on US Letter or A4 paper when the scale is right.

1. 1
   Open the print dialogPrint this page from your browser. The sizer is the drawing near the top of the page.
2. 2
   Set the scale to 100%Choose "Actual size" or a scale of 100%. Turn off "Fit to page", "Shrink to fit" and "Fit to printable area".
3. 3
   Print in black and whiteColor does not matter. The lines and numbers print in black.

Check the print with a ruler

Before you use the sizer, hold a real ruler or tape measure against the printed millimeter ruler. The 0 and 100 marks must be exactly 100 mm apart, and the 0 and 5 inch marks exactly 5 inches apart.

A small scaling error matters. Whole sizes are only 0.8 mm apart in diameter, so a print that is 2% small makes a size 7 circle 0.35 mm too small, which is almost half a size. On the 100 mm line, the same error is 2 mm, which you can see with any ruler.

If the printed line is not 100 mm, check the scale setting and print again. Do not use a sheet that fails this check.

Use the circles with a ring that fits

1. 1
   Pick the right ringUse a round ring that fits the finger and hand the new ring is for.
2. 2
   Lay it on the circlesBrilliant Earth's instruction is to align the inside edge of the ring with the closest circle. The circle's line should just show along the ring's inner edge all the way around.
3. 3
   Between two circlesIf the ring falls between two circles, choose the larger size, as Blue Nile and Brilliant Earth advise.

The number below each circle is its inside diameter. If you measured a ring with calipers instead, enter that number in the ring size calculator.

Use the strip on your finger

Cut out the strip along the dashed line. Wrap it around the base of your finger with the numbers facing out, slide the start end under, and read the size where the start edge meets the marks. Long marks are whole sizes and short marks are half sizes.

Paper slips and tears, so read it two or three times, later in the day when fingers are largest. The ring size measuring guide covers knuckles and wide bands, which can change the size you buy.

How accurate a printable ring sizer is

A correctly printed sizer is a close estimate. A jeweler's sizer, the set of metal or plastic rings in half sizes, is more accurate, and Brilliant Earth says a professional fitting gives the most accurate result. GIA advises against paper sizers because paper can tear, curl and shrink.

Use a jeweler, or a ring sizer you can order for a few dollars, before you buy an expensive ring or a band that cannot be resized, such as tungsten, titanium or ceramic.