Hi Sandra claire will pop on ltr for the sizing question and to update the pictures which have disappeared !! but as for lined or unlined heres my thoughts :
lined are very nice looking, fab patterns, very stylish, excellent at keeping water off your hound, a kind of half way between cold weather and hot coat, fold small but not as small as unlined
unlined fold up super small -pocket sized ..... more functional looking but also excellent at keeping water of your hound , def just for keeping rain off not going to help much with the cold.....
hope that helps