Blue Whale Spas replacement headrest also suitable for many other Chinese hot tub brands. Measurements - 22.5cm wide x 13cm tall x 4.5cm deep. The lugs on the back have a diameter of 1cm and they come out of the pillow approx. 1.5cm. (These are removable) The distance between the lugs is 10cm. As most pillow clips are fastened to the hot tub we do not send out pillow clips/pins with our orders, we will however send clips out free of charge if required please message us or leave a note when ordering ( A photo of you existing clip/pin is usually required )