These were made for a pair of Vintage JBL L166 Speakers I no longer have. They will also work perfectly for L100 or any larger diameter Speaker Cabinets
14"W x 14"D Beautiful Solid Walnut Speaker Stands (actual front to back depth will be 12" because of the way the cabinet sit's up against the back of the stand which takes up approximately 2") so figure 14" wide x 12" deep.
Perfect ear level Tilt for vintage JBL's
Last photo is generic just to show how they might look with JBL L100 Century Speaker.