Ever bought a picture frame online, only to have your prized artwork swallowed by a too-large opening, or worse, be entirely unable to fit? It’s a frustrating experience, and unfortunately, one that’s all too common. Properly measuring a picture frame seems simple enough, but subtle differences in terminology and measuring points can lead to costly mistakes. Knowing exactly what measurements you need – and how to obtain them accurately – ensures your artwork fits perfectly, looks its best, and saves you from the hassle of returns or resizing.
Whether you’re framing a cherished family photo, a stunning piece of art, or a valuable document, the right frame can significantly enhance its presentation and protect it for years to come. Accurate measurements are the foundation of a successful framing project. Without them, you risk damaging your artwork, wasting money on incorrect frames, or simply being dissatisfied with the final result. This guide will walk you through the necessary steps to measure picture frames like a pro, ensuring a perfect fit every time.
What measurements do I really need to know, and where do I take them from?
Should I measure the inside or outside edge of the frame?
You should measure the *inside* edge of the frame to determine the correct size of picture, artwork, or matting it will hold. This is also known as the “sight size.” The outside dimensions are generally irrelevant unless you’re trying to fit the frame into a specific space on a wall.
The inside measurement is critical because it dictates the exact visible area you have to work with. Think of it like this: you want to ensure your picture isn’t too big and gets cut off by the frame’s lip, or too small and leaves unsightly gaps. The inside edge represents the maximum dimensions of what the frame can display. Therefore, picture framing professionals and suppliers all base their sizing on this inside dimension. When ordering a frame, always specify the *inside* dimensions you need. For example, if you want to frame an 8x10 inch photograph, you would request a frame with an inside measurement of 8x10 inches. Manufacturers often list the “nominal” size, which refers to the inside dimension. If you’re measuring an existing frame to replace a picture, be sure to measure the inside carefully, ideally using a ruler or measuring tape that provides accurate readings in inches or centimeters.
What’s the best way to measure an irregular shaped frame?
The most accurate way to measure an irregularly shaped frame is to use a flexible measuring tape or a piece of string to follow the contours of both the outside and inside edges, then measure the string with a rigid ruler or measuring tape. This provides the outer dimensions for fitting into a space and the inner dimensions for accommodating the artwork.
When measuring an irregularly shaped frame, accuracy is crucial, especially if you need to replace glass or backing or are trying to fit the frame into a specific space. Using a flexible measuring tape (like a tailor’s tape) is ideal because it can bend and conform to the unique curves and angles. Carefully trace the outer edge of the frame with the tape, noting the total length. Repeat this process for the inner edge, which defines the area for the artwork. Be meticulous, ensuring the tape stays flush against the frame’s surface for the most precise reading. Consider taking multiple measurements at different points along the frame’s edge to account for subtle variations. For instance, measure the height and width at the widest and narrowest points. If you’re using string, mark the beginning and end points clearly before transferring it to a rigid measuring tool. These measurements will help you determine the maximum artwork size it can hold and ensure the frame sits correctly in its intended location. Don’t forget to account for any overlap or rabbet depth within the frame’s inner dimensions, as this will affect the visible portion of the artwork.
How do I account for the rabbet when measuring?
To account for the rabbet (the recessed area on the inside back of the frame that holds the artwork and glazing), you need to measure the *inside* dimensions of the rabbet, not the outside edge of the frame. This measurement dictates the overall size of your artwork, matting, and glazing package.
When measuring, ensure you are measuring the opening at the very back of the frame where the artwork will sit. The depth of the rabbet is also a factor, but less critical for initial sizing. It primarily matters to ensure your entire package (artwork, mat, backing board, glazing) doesn’t exceed the rabbet depth; otherwise, the backing won’t sit flush. A common mistake is to measure the outside of the frame, which will result in a package that is too large to fit. Pay attention to whether the frame is perfectly square. If it isn’t, measure both the top and bottom (width) and both sides (height) of the rabbet. Use the smaller of the width measurements and the smaller of the height measurements to determine the maximum size for your artwork. This will ensure your artwork fits snugly without being forced. It is also a good idea to test-fit your backing board before committing to your final measurements. Small imperfections in the frame or slight variations in the materials you use can affect the fit. Testing allows you to make minor adjustments before cutting the artwork or other materials to their final size.
What units of measurement are commonly used?
When measuring a picture frame, the most common units of measurement are inches (in) in the United States and other countries that use the imperial system, and centimeters (cm) or millimeters (mm) in countries that use the metric system. These units are used to determine the frame’s dimensions, including the length and width of the frame’s opening (where the picture will sit), the width of the frame’s border, and the overall outer dimensions of the frame.
The choice between inches and metric units often depends on the local convention or personal preference. In the US, inches are almost universally used for framing. However, artists creating pieces intended for international sale might opt for centimeter measurements, or provide both inches and centimeters, for wider accessibility. Online frame retailers will usually include both measurement systems in product specifications.
For accuracy, especially with smaller frames or detailed work, using decimal fractions of inches (e.g., 8.5 inches) or millimeters (e.g., 215 mm) is common. This allows for more precise cuts and fitting. Digital calipers offer the most accurate means for detailed frame measurements, as they can quickly display both inches and millimeters.
How accurate does my measurement need to be?
For measuring a picture frame, accuracy within 1/16th of an inch (approximately 1.5mm) is generally sufficient. This level of precision will ensure a snug and visually appealing fit for your artwork or photograph, while also accounting for slight manufacturing variations in frame or artwork dimensions.
Achieving the right level of accuracy balances practical considerations with the desired outcome. While striving for perfect precision might seem ideal, it’s often unnecessary and can lead to frustration. Minor inaccuracies, especially those smaller than 1/16th of an inch, are usually imperceptible to the naked eye once the picture is framed. Furthermore, natural variations in the materials used, particularly wood, can introduce slight inconsistencies. However, it is crucial to be especially precise when measuring for a mat. If you’re planning to use a mat board within your frame, the opening in the mat must be cut to precisely fit the visible image area of your artwork. Even a small error here can result in the mat partially obscuring the image or leaving unsightly gaps. Therefore, double-check mat dimensions and consider adding a very slight (1/32" or less) overlap to ensure complete coverage.
What if the frame is already mounted on the wall?
Measuring a picture frame that’s already on the wall requires a bit more care, but it’s certainly doable. Carefully use a measuring tape to determine the visible image dimensions from the front, and then estimate the frame’s depth and width with visual observation and perhaps a small ruler for the visible portion.
While you can’t get a perfectly precise measurement without taking the frame down, you can obtain accurate enough dimensions for most purposes, such as ordering a replacement print or a similar-sized frame. For the visible image area, measure the height and width of the artwork within the frame. Ensure the measuring tape is level and taut for accuracy. For the frame’s overall dimensions, estimate the width of the frame molding on each side and add that measurement twice to both the visible height and visible width of the artwork to derive the outside dimensions of the frame. Keep in mind that estimating the depth of the frame while it’s on the wall will be less precise. However, this measurement is often less critical than the overall height and width. If you need an accurate depth measurement (perhaps to ensure a new frame will fit a specific hanging mechanism), it may be necessary to gently remove the frame from the wall. If you’re unsure, always err on the side of caution and consider removing the frame or consulting a framing professional for assistance.
And there you have it! Measuring a picture frame doesn’t have to be a headache. We hope this guide made it simple and straightforward. Thanks for reading, and please come back anytime you need a little DIY help!