Meters and centimeters will almost always have a number next to the mark; all you have to do is write that number down along with the unit of measure. Millimeter marks usually are not numbered, but because there are only 10 millimeters between each centimeter, they're easy to count. Make ...
How To Measure Your Frame SizeWhat Is Pupillary Distance(PD)? Pupillary Distance (PD) is the distance, in millimeters, between the center of one pupil to the center of the other. The PD is needed to manufacture your eyeglasses because it determines the exact optical center of the lens, ...
U.S. ring sizes follow a scale of numbers (and half numbers), typically from ring size 3 to 13.5 for adults. Those units match your finger's width in millimeters: A ring size 3 fits a ring finger (or any finger) that is 14 millimeters across, and the sizes climb from there. Standa...
When you are ready to measure your pupillary distance, download our special ruler here: Download NowWhat is PD? Pupillary distance, sometimes referred to as pupil distance or just PD, is the distance between the center of each pupil and the bridge of your nose measured in millimeters. Pupil...
Square centimeters (cm2) is a unit of area, not unlike square inches. Finding the area of a shape or object in square centimeters is a two-step project. First, you measure parts of a shape, then use the appropriate equation to calculate the area of the s
Discover how to measure your pupillary distance and understand why it's vital for your eyewear. Find the perfect fit for your glasses using our Opthy app.
Learn what PD is and how to measure it for glasses online with GlassesShop. Understand PD, find your number, and choose the right glasses for your needs today!
One of the most frequently asked questions we get here at Ikepod is about the size of a watch from our collection. When looking at watch size, we actually speak in millimeters. Indeed, the unique Ikepod watch design means knowing how to measure a watch matters more than for timepieces. In...
ring size charts and other tools to measure your ring size at home, but if you'd rather get it done by a professional, that's absolutely an option. In fact, possibly the easiest ring sizing method of all is to skip the ring size chart and go straight to the source: a jeweler, whic...
How to measure the diameter of the bolt circle? The diameter is measured in millimeters or inches. It is calculated by taking the distance between the two farthest studs or by using an instrument that indicates the circle's diameter between the two nearest drilled holes. Depending on the model...