before I write a review for these , ill explain the size difference . contrary to what people be say just because you have a big hand do not mean you should op for a 16 oz . the 16 oz be for spar , mean that it have extra padding near the knuckle area to protect you partner , not you . the 14 and 12 oz be bag glove , mean they provide protection for you hand but not what you be punch . do not spar with these as they could critically injure you opponent . that be say if you plan on buy these and join a gym , you should opt for the 16 oz , as most gym have a 16 oz minimum . I opt to buy the 16 oz because im a amateur fighter and for conditioning purpose . these glove be very snug when you put they on , but do not worry because like shoe you will need to break they in . the thing i didnt like about these glove be the thumb lock , as put the glove on by yourself become almost impossible . however these be very high quality glove for they price and you be get what you pay for .