How do I send it back to get a bigger size

This jacket can really elevate your style! I’m stuck between an M/L on FN sizing but wanted this to be to be closer to my shape so I stuck with an M. It fit like a glove. I have an athletic build (wider shoulders, back, chest, and ribcage) but this fit it all perfectly, bordering too small. It would look fantastic on someone a little less muscular and a little more wispy in my opinion. I wasn’t planning to zip it up, but I did try and it’s snug in just the right way if that’s your preference. Despite having long arms, this came halfway down my hands almost in a sweater-paw look; choosing an L would’ve been too large arm-wise. My torso is long so it stopped right at the top of my high-waisted bottoms; I prefer longer items than that but if you like it sitting just at the top of your bottoms so you can wear a crop top, this is perfect for you. I wore it out once and got three compliments on it and a lot of stares already in places there weren’t many people. It has a very trendy look to it and really took my streetwear style to the next level! You’ll look fashionable without even trying.