This is a mesh cap distributed to public elementary schools to commemorate the 5th anniversary of the Yokohama DeNA BayStars. The size is S (54-58cm). It has been used a few times, so there is some slight shape distortion in the mesh part. It has been stored for a long time, so please understand this before purchasing. (It has been washed.) I will wrap it in cushioning material, but please note that it may lose its shape slightly during shipping.