I'm considering the This content is protected or This content is protected for bag work and the This content is protected for sparring. I contacted Rival's customer support to ensure the right size for me and they suggested I get 16 oz sparring gloves and 12 oz (L) bag gloves. Considering I'm 240 lbs (hopefully not for long), I can see why 16 oz is required for sparring. My hands are normal (not big) so the L-sized bag glove recommendation also makes sense. However, I'm concerned that training on the heavy bag with 12 oz will see me completely out of breath when sparring with 16 oz. Is this a legitimate concern? (The other way around wouldn't be a problem, of course.) Alternatively, which high-quality 16 oz bag gloves available in Canada would you recommend instead? Elsewhere, some suggested that I just buy one pair of sparring gloves and use it on the heavy bag as well, but my understanding is that it will quickly make them inadequate for sparring. I'm an absolute (recreational) beginner, but my hands are important to me so I don't mind spending good money on high-quality gloves.