Henry's cute. I think he looks ok, but I'm not an expert. I just found something that said a syrian, fully grown can weigh 6 or 7 ounces, 7 ounces = 198g, so if you were worried you could maybe try and get Henry to loose 10g. It also said an ounce (28.3g)for every inch of length, have fun trying to measure Henry
Before I read that I think I thought syrians should be around 150-200g,with some smaller ones weighing even less. I think as long as you are giving him a healthy diet, his food mix along with some veggies and occasional treat, he should be ok. But say you were giving him a sugary treat every day, then that could be a problem.