K.MD.A.2
Put two objects side by side and say which is longer, taller or heavier.
Worksheet in progress
A worksheet for this standard is on the way. Meanwhile, practice what leads up to it:
The standard, officially
Directly compare two objects with a measurable attribute in common, to see which object has “more of”/“less of” the attribute, and describe the difference. For example, directly compare the heights of two children and describe one child as taller/shorter.