Which quantity is larger 5mL or 5 dL

ml and dl are the units of measurement of volume.

ml stands for millilitre while dl stands for decilitre.

1 ml = 10^{-3} l

and 1 dl = 10^{-1} l

Thus as it can be seen, dl is a bigger unit than ml.

Therefore, 5 dl is larger than 5 ml.