Is it true that four years of graduation are needed to study abroad in UK for a Master's/Bachelor's?

No, a four-year bachelor's degree is not always required to study abroad. Many countries, including the UK, accept three-year bachelor's degrees for master's admissions.

Some universities or programs may prefer a four-year degree, especially for competitive courses, but this is not a universal rule. Requirements vary by country and institution.

With your four-year Commerce degree, you meet the typical academic eligibility for master's programs in the UK. Make sure to check any additional requirements like English proficiency (IELTS) for your chosen universities.