We've seen a sofa we really like. Our living room is large, however it's more long than wide, iukwim. It's around 19ft long by 10ft wide. The sofa we've seen is a corner sofa & last night I was trying to measure out how it would fit & I couldn't believe the measurements were adding up to the sofa being 8ft x 8ft! When we sat in the display model in the warehouse, there was no way it was 8ft x 8ft! (247cm x 245cm) so what am I doing wrong?