You ladies are the experts and use gsm weights so not sure if my comment will be relative. I’m still using # paper weight understanding. Crane has a 268# stock that is perfect for deep impressions on both sides. I’ve designed several letterpress business cards with deep impressions on both sides on this stock and love it. Have done several invitations with it as well. It is much, much thicker than the Lettra. I’d have to double check before you quote me, but I think it’s tree free.