I know this post is old, but I just came across it. We just adopted a St. Bernard mix last week, we think she's mixed with lab. She is the sweetest thing ever, when we were at the shelter, she put her head on my lap in the viewing room <3 She sits when I have the leash to put on her, she doesn't bark much, she's calmer than we hoped (We wanted a mix of calm and hyper) she doesn't like playing with toys or anything. She's full grown, a little skinny, weighs 62lbs. So she's a decent sized dog. Not as big as some other breeds though which is good with me!
there's a picture of her