The rule of thumb I use is that vocabulary size roughly doubles between levels. So 500 at A1, 1000 at A2, 2000 at B1, and 4000 at B2 (and 8000/16000 for the C levels). Dunno how accurate this is but it feels broadly correct to me.
The rule of thumb I use is that vocabulary size roughly doubles between levels. So 500 at A1, 1000 at A2, 2000 at B1, and 4000 at B2 (and 8000/16000 for the C levels). Dunno how accurate this is but it feels broadly correct to me.