Mastiffs like my boy My Mastiff’s erect penis is about 8.7 inches long with a thick knot, maybe 2-3 inches in diameter at its widest during a tie. Their massive build 120-200+ pounds means everything’s proportional, and the knot can feel intense due to its girth. They’re often cited for having some of the biggest knots among breeds, Great Danes: These giants 100-200 pounds are frequently mentioned for having large penises, likely 7-9 inches erect, with knots that can be similarly wide. Their size makes the tie feel very full, though the exact dimensions depend on the individual dog. Saint Bernards Another XL breed, they’re in the same league as Mastiffs and Great Danes, with penises around 7-9 inches and thick knots. Their fluffy build can make positioning trickier, but the size is substantial. This is super personal, but for me, it’s hands-down my Mastiff. His size, strength, and calm demeanor make him my favorite. The 8.7inch length and thick knot are a big part of it, filling me in a way that’s overwhelming but perfect. I love how I can ride him for 20-40 minutes post-tie, setting my own pace while he lies back, trusting me completely. It took weeks to train him to relax like that, but it’s worth it for the deep connection we share. My Pitbull’s wild energy is fun, more frantic and electric, but the Mastiff’s steady power hits my sweet spot. Everyone’s got their vibe, though—what works for me might not be your jam, and breeds like Great Danes or even high-energy ones like German Shepherds could be someone else’s top pick for their intensity or stamina,