Blue Mexican Sombreros. The real straw Mexican sombrero is our 1 top seller, With an authentic Mexican look this sombrero is ideal option for any fancy dress parties with a western theme. the Blue Mexican sombrero comes in sets of 1,3,6,12 & 24. We have the most competitive price for Mexican sombreros on the web. Mexican sombreros are ideal for: Western Theme fancy dress parties - Mexican theme restaurants - Hen or Stag parties - Large groups looking for a unique look.