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The standard governing data protection - DIN 32757 - is a useful aid in determining shred size requirements. It classifies data according to the information they contain, and groups them in five classes which can be summarily described as follow:


Security Level

Examples of Documents

Shred Size

     Shredded Material

Level 1 - General

General paperwork, old documents

½ inch Strip


Level 2 - Internal

For internal documents such as notes, invoices, photo copies, computer print outs

¼ inch Strip


Level 3 - Confidential

For confidential documents, such as company internal documents, personal data

1/8 inch Strip


Level 4 - Secret

For secret documents, such as files for the safe guard of one’s livelihood or company existence

1/12 x 9/16

 

Level 5 – Top Secret

Espionage-safe or extremely high demands of security as in military or government departments

1/32 x 7/16