You can take your lead from the spiritually evolved teachers who have given guidance on this matter or listen to forum members....

From the former's perspective we are taught that our etheric body is largely a visual duplicate of the one we currently have inasmuch as we will still be recognisable as our earthly selves BUT the etheric ones will not have any physical faults and will look as our bodies did when we were at our physical, adult prime. (or should have done if something had prevented that happening)

For those who are concerned that they will have no body, or they will have a different appearnce, I hope they will gain reassurance that their fears are unfounded.

As for the solidity of our etheric bodies, again we are taught that they will feel just a solid and 'real' as our present ones - we won't become diaphanous and float around on the breezes!