Frames sizes come in 3 main units of measurement, namely imperial (feet and inches) metric (centimetres) & the International Standards Organisation (ISO) system . The ISO system is sometimes mistaken as a metric system; in fact it is neither Imperial or Metric but an index of standards.

In the United Kingdom (UK) the most commonly encountered size is A4. This is the size which is most often used for documents and certificates. Due to the popularity of home computers and printers , it has become a common photograph size.

The dimensions of A4 are 11.69 inches x 8.27 inches in imperial measurement, or 297mm by 210mm in metric. The key characteristic of an ISO size is it retains its aspect ratio (shape) when folded or doubled.

An A4 frame means that an A4 size picture can be framed by dropping the sheet into the insert area without cutting. Frame sizes by convention refer to the area of picture to be framed, which means (with the exception of borderless clip frames) that the actual frame will be larger than the specified size. The overall visible frame size can be estimated by adding the frame moulding size less a 1/4" to the frame (insert) size.

Size A4 has good reason to be popular, it is aesthetically pleasing, provides a useful size for document use, easily scaled, and gives a near 3 by 2 Aspect ratio for photograph use.

• Supplied with traditional glass or plastic as option.
• External Dimensions 25cm x 34cm x 2 or 3 cm.
• Internal Area 29.84cm x 20.95cm (Perfect for A4).
• Hard Back and strut for Desktop, clips for Hanging.
• Suitable for Portrait or Landscape pictures.

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Option Styrene Plastic 'Glass'

Frames are supplied with traditional glass as standard. As an optional extra frames can be supplied with Styrene (Perspex like) plastic glass. Virtually unbreakable with appearance of glass, this provides a suitable 'Health and Safety' solution for vulnerable environments (Schools, Prisons etc.)