These are the best lumbar pillows ever bought!  And their indoor/ outdoor!  I bought the dark blue, which isn't as stark as navy blue.  I chose the 12"x24"x6" size and it gives my back ample support.  I've had neck and back surgeries so sometimes I use one horizonally and the other vertically, so my spine is supported.  It's a calmer atmosphere here because I don't blame chairs anymore for the pain.  ;-)  ty.