Chaise lounge/ long /wide low stool (Overslade CV22)

Hey, so, I'm looking for a chaise/stool for my rescue lab, she adores watching the world go by, the seat she has at is a bit narrow n short n the leg keeps falling off n she's getting on a bit n I wanna watch any damage to her hips etc. Im looking for anything minimum 1 metre minimum long, 24"ish wide, ish. N height 24 ish " of able to cut down
.. Tia, xxx