Help with Measuring

Help with Measuring

 

Basic understanding

1 millimetre (mm) is the very tiniest unit of length on the common tape measure or ruler. This is the form of measurement we use most in framing being the most accurate.
1 centimetre (cm) is the unit of length going along the bottom of the example tape measure below. There are 10mm in 1cm.
1 inch (") is the unit of length going along the top of the example tape measure below. This is the most commonly used measurement in the United States. There are 25.4mm in 1 inch.
Tape Measure
There are 148mm showing on this tape measure (or 14.8cm).

Everyday examples

CD Diameter of a CD or DVD: 120mm
Bic Pen Length of a Bic Pen: 138mm
Envelope Length of an envelope: 220mm

Example of Frame vs Frame with Mat

Frame vs Frame with Mat
When we have options of frames or frames with mats e.g. "8x12 inch Photo Frame" or "8x12 inch Photo Frame with Mat Border", the "8x12" refers to your actual picture size only. So for the frames with mat category, the mat border goes around the "8x12" picture and then the frame around that, therefore the frame is larger.

Example of picture overlap

picture and frame
When framed, your picture is covered by approx 5mm around the edges. This is the "rebate".
picture with mat and frame
When framed with a mat your picture is covered by approx 3mm - 5mm. It is important to have some overlap otherwise your picture would fall through the mat window (opening).
Benjamin Bowring Print and Signs© 2014