Like new vegan leather doc martens 2976

Like new vegan leather doc martens (2976). They’ve only been worn around the house in an attempt to see if I could make them work, but sadly they’re a little too tight for me. Since doc martens can be a little tricky on sizing, for reference, I’m a 7-7.5 depending on the shoe. I can put these on but they’re too tight to be wearable for me so a 5.5-6.5 might fit them well?