This is a SC. It has patch pockets. A (true) blazer has flap pockets, is dark navy and has six golden buttons in the double breasted form and three or four buttons (I forgot) on each sleeve or three buttons + four on each sleeve in the single breasted form. Other colors are possible: black, camel, bordeaux, dark green. Other buttons are possible: mother of pearl, vitreous enamel. Anything else is probably a SC. Could it be that this SC is one or two sizes too small for you? Do you feel comfortable when moving around with your arms? Does the SC move with your arms?