The bond Length decreases with increase of bond order which is the multiplicity of bond.

If BO is 1 its a single bond; 2 for double bond and 3 for triple bond.

 

H₂O₂ has all single bond with bond length 1.41A⁰ 

 

O₂ has double bond with bond length 1.33A⁰ 

 

O₃ has a partial double bond due to the resonance of lone pairs of electrons thus if we arrange the above molecules a/c to their bond length it would be - 

 

H₂O₂ > O₃ > O₂