Steve Madden Mens 35mm Casual Reversible Belt Cognac/Black 34 One Size

Q: Is this belt under 2 and a 1/2 inches wide?

The belt is 1& 1/4 inches wide, buckle is 1 &1/2 inches wide.

Q: How wide is this belt?

1.25 inches seems right. it looks thinner than the picture right when you takw it out of the amazon packaging. on the side of women's belt. kinda disappointing

Q: Those the sizes are us or eu?

U.S. I would follow the suggested size up in the chart for your waist size. My fit was perfect as I ordered the next size up from my actual waist size. Hope this helps.