–When C1 is between 19☐.3mm, it is acceptable Suppose the boxing bridge size is 20mm, and the groove depth of the rim wire is 0.5mm,įor full rim style, then the value you get (C1) should be 19mm, it is: 19mm+2×0.5mm=20mm, It is the actual value you get using the caliper according to the method above mentioned. For a half-rim or rimless frame, the “DBL”= L2 (refer to the drawing below). The actual bridge size (for full rim) “DBL”= C1-2a ( “a” is the groove depth of the rim wire). The minimum value you get is C1(refer to the drawing below) Use a caliper to measure the inner side of two rims, which are beside the bridge, and must be parallel to the horizontal axis of the frame. Glasses Measurements – Bridge Size of Eyewear Depth (DBL)ĭefinition: The bridge size, which is initialed as DBL, is the horizontal Distance Between two Lensesģ.1 Measuring Bridge Size of Eyewear Method: –And if B1 is out of 29☐.3mm, it is not acceptable.ģ. –When B1 is between 29☐.3mm, it is acceptable Suppose the boxing rim depth is 30mm, and the groove depth of the rim wire is 0.5mm, then the value you get (B1) should be 29mm, it is: 29mm+2×0.5mm=30mm The actual rim depth (for full rim) “B”= B1+2a ( “a” is the groove depth of the rim wire). The maximum value you get is B1 (refer to Pic 1). Then use a caliper to measure the inner gap of the rim, which must be parallel to the vertical axis of the rim. Put the former in the rim, with the rim lock line on the former aligned with the rim lock milling point of the rim. ![]() 1 How to measure glasses’ eye rim B size – Method: Glasses Measurement – Eye Rim Size of Eyewear Depth (Size B)Ģ. –And if A1 is out of 49☐.3mm, it is not acceptable.Ģ. ![]() –When A1 is between 49☐.3mm, it is acceptable Suppose the boxing rim size is 50mm, and the groove depth of the rim wire is 0.5mm, then the value you get (A1) should be 49mm, it is: 49mm+2×0.5mm=50mm For full rim with T-rim wire, the measurement is the same as half rim (refer to Pic. For half-rim or rimless frames, the value you get is the actual rim size A (ref# to pic. The actual rim size (for full rim) “A”= A1+2a ( “a” is the groove depth of the rim wire). The maximum value you get is A1 (refer to Pic 1). Then use a caliper to measure the inner gap of the rim, which must be parallel to the horizontal axis of the rim. 1 How to measure glasses’ eye rim A size – Method: Glasses Measurement – Eye Rim Size of Eyewear Width (Size A)ġ. The meaning is that 48 represents eye rim size, 19 represents nose bridge size, and 135mm represents glasses temple size. These 3 numbers reflect the size of different parts of the frame. You can usually find the size on the inside of the temple of your glasses or on the lens, and frame size is usually shown as three numbers separated by dashes, such as 48-19-135mm (in inches). The best place to start is to read this guide carefully and analyze the head dimensions of you or your client base. To ensure that your frames fit your face correctly, you must first determine the best frame size. Fortunately, Glasses Measurements is actually very simple! Here’s a helpful guide to understanding eyeglass sizes and measurements, written by iDetail Sunglasses Manufacturers. ![]() A thorough understanding of frame sizes and how to measure eyeglasses is an important part of buying and designing sunglasses.
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