Tom is as old as his brother.

[tufguy]

"Tom is the same age as his brother."

"Tom is as old as his brother."

"Tom is the same height as his brother."

"Tom is as tall as his brother."

Please check.

 

[Rover_KE]

All OK.

 

[Roman55]

Are they twins?

 

[tufguy]

Are they twins?

Yes, imaginary twin brothers.

 

[Matthew Wai]

Tom and his twin brother are the same [STRIKE]age and[/STRIKE] height.