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A Subtle Art, Not a Guess Whether you’re shopping for engagement rings, slipping on a wedding band, or surprising a loved one with custom jewelry, the correct size is everything. A ring should feel like it belongs at the base of your finger. Never too loose, never too tight, and always just right. If you're not sure how to measure ring size—or you're helping someone else find theirs—you're in the right place. We are experts here at Adam Foster Fine Jewelry. Below, we’ll walk you through simple methods, tips, and tools for getting an accurate ring size from home, as well as what to expect when working with your local jeweler. Understanding Ring Size Basics Let’s start with the essentials. In the United States, ring size is typically measured in whole and half sizes, from size 3 up to 13 and beyond. Each size represents a specific diameter of the ring, and even a difference of half a size can affect how comfortably a ring fits. US ring size vs. international ring size: If you’re comparing sizes from overseas jewelers, use a ring size conversion chart for clarity. Men’s ring sizes vs. women’s ring sizes: These may vary, but there’s no general rule as finger size is unique to the individual, regardless of gender. That being said, the average ring size for women is typically between size 6 and 7, while men often fall between size 9 and 11.   How to Measure Your Ring Size at Home You don’t need to leave the house to start figuring out your ring size. Whether you're browsing for a new piece or preparing for a secret gift, these techniques can offer a fairly accurate measurement. 1. Use a Piece of String or a Strip of Paper Wrap a piece of string or a strip of paper around the base of your finger (where the ring will sit). Mark where it overlaps, then lay it flat and measure the length in millimeters. Use a ring size chart to match your measurement to the corresponding size. Be sure the string slides over your knuckle comfortably. Measure at the end of the day, when your fingers are slightly larger. If you’re between sizes, size up for a more comfortable fit.   2. Measure a Ring You Already Own If you have an existing ring that fits the intended ring finger, you can measure its inside diameter and compare it to a printable ring size chart or a ring size guide. Just make sure the ring you're measuring matches the ring style you’re planning to buy. 3. Try a Printable Ring Sizer Many jewelers offer a free ring sizer tool. These templates allow you to either place a ring on a chart or cut out a sizing strip to wrap around your finger like a measuring tape. Be sure your print settings are set to 100% scale for an accurate ring size. Ring Sizing Tips from Our Jewelers Here at Adam Foster Fine Jewelry, our team of expert jewelers and master jewelers has helped countless clients find their perfect fit. Here are a few of our favorite ring sizing tips: Time of day matters: Finger size fluctuates throughout the day. Measure at the end of the day when your fingers are largest. Temperature affects fit: Warm fingers swell slightly, while cold fingers contract. Aim to measure in a neutral climate. Wider bands require a larger size for a comfortable fit: A solitaire ring will fit differently from a bold custom design. When in doubt, visit a local jeweler for an in-store fitting: It’s quick, precise, and gives you peace of mind.   When Do You Need a Resize? Even with careful measuring, ring resizing is sometimes part of the journey. Maybe your finger size has changed, or your grandmother’s ring is just a little too snug. Our jewelry services include precise resizing for engagement rings, wedding rings, and other fine pieces. Whether it’s a delicate prong setting or a thick shank, we handle every piece with the respect it deserves. Resizing often involves soldering and reworking the custom jewelry without disturbing its integrity. We also inspect the center stone, clasp, and structure to ensure everything remains secure. The Adam Foster Fine Jewelry Experience At our St. Louis jewelry store, we believe that every piece of jewelry tells a story. That story should begin with a perfect fit. From the elegance of lab-grown diamonds to the timeless charm of heirlooms passed down through generations, we tailor every step to you. If you're unsure where to start, or if you’re helping someone else measure their finger size, we're here to guide you. And if the ring doesn’t fit just right? Come see us for an expert ring sizing consultation. We’ll make sure your engagement ring, wedding band, or custom creation is not just beautiful, but beautifully worn. Stop by our intimate studio! Appointments are encouraged, but walk-ins are always welcome! Contact us today.