The Council of Europe Common European Framework of Reference (CEFR)
The Council of Europe Common European Framework of Reference (CEFR) for Languages distinguishes five competences, spanning Understanding, Speaking and Writing, at six levels from complete beginners (A1) via A2, B1, B2, C1 to very competent speaker (C2).
You can download the PDF of CEFR self-assessment grid EN (ensure you select the EN version) from the above link which has all the competences and level descriptors on one page. You may be at different levels in different competences.
Modern language modules at The Open University relate to the framework as follows:
|Beginners’ modules (L192, L193, L194, L195, L197)
||No prior knowledge or A1
|Intermediate modules (L112, L113, L116, L150)
|Upper intermediate modules (L222, L223, L226)
|Advanced modules (L310, L313, L314)