Jas SP-MBA Speaker Stand Walnut /Marble Base /Adjustable Hight Constructed with solid wood uprights and an 11"x7" steel platform that attaches to speakers with two Phillips head bolts and rubber grommets. The 1.75"-thick marble base is 13"x13" for maximum stability and support. The top plate is 7" x 7 3/4" ..The stand can be adjusted from 24" to 28" to fit your system's design.