Large gloves have always fit my hands, perhaps the manufacturer has small hands. I can wear most manufacturer's mediums.
I heard stitches tearing on the right hand the first time I wore these gloves but they were on the seam near the Velcro and maybe(?) expected.
Yesterday I notices the stitching on the left hand glove near the index finger is coming apart. I view this as a no stress area.
I certainly expect more from Castelli. Especially after less than 1 month.