This is a vintage, Mid Century Royal Windsor pedestal planter or footed vase.  The antique, gray and pink glazed pottery is embossed Royal Windsor on the bottom.  From what I've learned, Royal Windsor USA was a line, along with Royal Copley, utilized by the Spaulding China Company of Sebring, OH between 1939 and 1957.  This lovely pastel planter belonged to my Mother who used it as a floral base.  The 1950s time frame is a good match.  The Mid Century pottery is in great shape, free from breaks or cracks.  There are some dirty smudges inside the pottery from long term use.  The glazed pottery measures about 5" x 4.5" x 4.25".  It is a lovely piece of Mid Century decor.