Armarkat Cave Pet Bed - Brown & Beige

What are the correct measurements? woot! lists 17"L x 12"W x 15"H. Amazon lists 18 x 15 x 14 inches.

Has a 4.5 star average rating at amazon (1169 ratings)but the ratings are aggregated for 8 different models. Negative reviews all focus on it not being stable and top flopping down. $21.08 prime price is not much more than here.

Product Dimensions: 18 x 15 x 14 inches ; 2 pounds

Item model number: C27CZS/MH