The weight of a metal sign depends on various factors, including its size, thickness, and the type of metal used.   The chart below shows 3 common sign sizes with 2 different thicknesses and contrasting steel and aluminum weights for each.   You can use this chart for sign weight as an approximation.  A sign most likely will have some sections cut out which would decrease the weight.  the sign may also use multiple metal panels which also need to be taken into account for sign weight.   As sign designers, SirMetalman can advise on a material usage depending on your sign environment and area size and desired thickness all for visual appeal and manufacturability of the sign.  Material and sign size also effect sign material price as aluminum typically costs more than steel and the thicker the piece the more expensive. Common Metal Sign Weights by size Chart showing metal sign weight Comparing steel and aluminum Contrasting different thickness and area