It's actually a bit longer than that. I'll try and remember what else was with it:
Oh everything comes in its own special size.
I guess it can be measured by where you put your eyes.
It looks big when you're close,
It looks smaller back a bit;
That's about the size of it.
That's about the size, where you put your eyes,
That's about the size of it.
Oh the big becomes the little
When you see it back a bit.
The huge becomes the dinky
Which is just the opposite
Of the larger that gets smaller,
It never seems to fit
That's about the size of it.
That's about the size, where you put your eyes,
That's about the size of it.
Oh, the big becomes the little,
That's the way it seems to go.
The huge makes up a larger thing
(???????????????????????????????)
It's great to know that though we're small,
There's always room to grow,
And that's about the size of it.
That's about the size, where you put your eyes,
That's about the size of it.
It was made by the same people that did the "Donnie Bud" cartoon series: Don Hadley and Bud Luckey. One of my most favorite clips.