The code for Slovenia itself is SLO. The registration plates are made of metal. On the left there is a blue bar as in other EU countries (in use since 2004) along with tamper-proof text up to 2008; the text is in black letters on a white background in Helvetica typeface.
Slovenia's country code is SLO. The vehicle registration plates are made of metal. On the left, there is a blue bar consistent with other EU countries (introduced in 2004), accompanied by tamper-proof text until 2008; the text is displayed in black letters on a white background using Helvetica font.