The legs are 8” and metal.  I like the bed it is sturdy and modern.  What bugged me was 10 nuts and 10bolts were missing and I was paying to have it assembled.  It can’t be assembled if the equipment isn’t available.  Noticed this is a problem with others. Perhaps robots could count better.  One reason I chose was because made in USA. The height of the 13 inch mattress is 22”. Same as a sofa seats. So my small dog could easily get up.  You really have to research because many times misinformation is given by wayfair