Detection of multiple makers with different sizes

[elstongunnn41]

I need to detect multiple markers (one at a time) of different sizes, because I'm using a drone and it needs to detect a big tag when it's high (like 5 metres) and a smaller tag when it's not too high (like 1 metre), because the big tag is bigger than the field of view of the camera when the altitude is small.

How can I do that? I read solutions for just 1 tag and for multiple tags of the same size, but how can I detect multiple tags (one at a time) of different sizes?

Thanks