Roominess
/ˈruːminəs/
Definition 1 of 1
Pro Tip 1/3Physical Spaces
Use 'roominess' to discuss the size and comfort of physical spaces like homes or vehicles. 
The roominess of the lobby impressed the hotel guests.
Pro Tip 2/3Positive Connotation
'Roominess' often suggests a positive aspect of space, implying ample room and ease of movement. 
The roominess of her new apartment made her feel very comfortable.
Pro Tip 3/3Marketability
In advertisements, 'roominess' is often highlighted as a desirable feature, especially for family-oriented products. 
The minivan's advertisement boasted about its roominess and cargo space.