Brother MFC-J425W Software User's Manual page 54

Scanning
Document Size
Choose one of the following sizes:
 Auto
You can scan a standard sized document without any further adjustments to Document Size. If you want
to use Auto Crop, choose a Document Size other than Auto.
 A4 8.3 x 11.7 in (210 x 297 mm)
 JIS B5 7.2 x 10.1 in (182 x 257 mm)
 Letter 8 1/2 x 11 in (215.9 x 279.4 mm)
 Legal 8 1/2 x 14 in (215.9 x 355.6 mm)
(Available on ADF models)
 A5 5.8 x 8.3 in (148 x 210 mm)
 Executive 7 1/4 x 10 1/2 in (184.1 x 266.7 mm)
Business Card 3.5 x 2.4 in (90 x 60 mm)

To scan business cards, choose the Business Card size, and then put the business card face down at
the top left of the scanner glass.
4 x 6 in (10 x 15 cm)

5 x 8 in (13 x 20 cm)

 3.5 x 5 in (9 x 13 cm)
 5 x 7 in (13 x 18 cm)
 Postcard 1 3.9 x 5.8 in (100 x 148 mm)
 Postcard 2 (Double) 5.8 x 7.9 in (148 x 200 mm)
 Custom
If you choose Custom as the size, the Custom Document Size dialog box appears.
Enter the Name, Width and Height of the document.
You can choose "mm" or "inch" as the unit for Width and Height.
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