The pair having nearly same atomic size due to Lanthanoid contraction is

Except in 3rd group (Sc, Y, La) in all the groups of d-block the atomic radius of 4d & 5d elements is  nearly same due to lanthanoid contraction.Zr ( Z =40 ) and Hf ( Z =72 ) have nearly same size;Fe, Co have nearly same atomic radii but not due to Lanthanoid contraction;