Cad blocks

Hi all, I have just downloaded a cad block from the internet and imported it into rhino, how do I extrude it so that all of the measurements are right as when I extrude it just by selecting the whole thing it gives me off measurements
Thanks in advance

If it was a .dxf, it doesn’t have units, so most likely you will need to scale. If you can figure out what unit system it was supposed to be, instead of opening the file you can try to open a new file in those units and then use Import to import the block.