A range of allowable sizes from 80% to 200% of the nominal size are also specified and a figure showing the range of dimensions can be found in GS1 General Specifications, Section 5.1, Appendix 7.
Mafunzo hayo pia yaliweza kufanyika kwa wafanyabishara, wafanyakazi wa serikali pamoja na Bodi ya GS1 (TZ) National Limited. Muda wa mafunzo hayo ulikuwa wa wiki mbili. 5.1 Utoaji wa huduma za barcodes