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Comparison of file sizes

One of the many benefits in using TrueType fonts instead of bitmap graphics is the significant reduction in document sizes that can be achieved. To illustrate this we have produced the following example. It is based on a fairly typical document created using Microsoft Word and includes various logos, symbols and a signature.

File size test page

The table below shows the various document sizes produced using TrueType fonts, 300 dpi (dots per inch) bitmaps and 600 dpi bitmaps.

Empty Word Document 11KB
Word document using TrueType fonts 13KB
Word document using 300 dpi bitmaps 301KB
Word document using 600 dpi bitmaps 876KB

The use of TrueType fonts has a negligible affect on the size of the document whereas the documents that include bitmap graphics dramatically increase in size, with the 600 dpi version being over 67 times the size of the version using TrueType fonts. The example shown here has used the industry standard BMP graphics format which is commonly used by many organisations.

File Formats

In addition to the BMP (Windows Bitmap) file format used in the above example other file formats such as TIF, JPG and GIF are also commonly used. The table below shows the file size of each of the images used on the above example document in the various file formats at 300 and 600 dpi.

File Format

Image

Size in bytes
at 300 dpi

Size in bytes
at 600 dpi

BMP

Union Flag

34,822

134,418

Formula Widgets plc

120,478

477,478

Made in GB

4,010

15,798

Recycled

9,450

33,658

Signature

35,206

136,726

Crown

21,070

81,046

GIF

Union Flag

2,487

4,675

Formula Widgets plc

14,742

28,373

Made in GB

1,639

3,959

Recycled

2,543

5,459

Signature

2,939

12,301

Crown

6,974

20,961

JPG

Union Flag

30,447

73,033

Formula Widgets plc

59,228

119,551

Made in GB

22,174

50,676

Recycled

9,642

27,927

Signature

27,409

64,912

Crown

25,514

67,661

TIF

Union Flag

42,395

139,385

Formula Widgets plc

121,075

478,735

Made in GB

4,114

16,631

Recycled

9,954

34,639

Signature

40,775

141,805

Crown

26,359

83,535

Even using the most efficient of the 600 dpi file formats shown above, a document would increase in file size by over 75KB compared to the negligible increase in document size by using a TrueType font. Not only does an increase in file size put an increased demand on system resources such as hard disk space and system memory, but also the larger document sizes can significantly slow down an application when loading, saving and printing the document.

In addition it is important to remember that none of the file formats listed above are scaleable. Therefore to produce a high quality image a file would need to be produced for each size required. This often means that a large number of files need to be produced as images may be required at several sizes and may need to be made available to users at various resolutions. Compare this to a single fully scaleable TrueType font that can produce images of any size and at the optimum resolution of the output device.

All of the images used on the above test page are contained in our free demo TrueType font. Click here to visit the download page and then you can try out the benefits of TrueType logos for yourself.