Different element size on shared surface edge

Hi,

I am more interested in stress distribution at one location of the model than on some other parts. In the field of interest I would like to make mesh finer compared to other regions of the model.

This means that on the shared surface edge I would like to have 2 different element sizes. Could someone tell me how to do this? I am using 2D shell elements with 2D-automesh panel and this tool does not allow to have different element sizes on shared edge.

Please also see the attached figure.

Thank you.