Why the alignment not match

hi need help learning with the reference image I have align the side (right hand view) when im trying to align with the left hand view (front view) Mesh getting disturb

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It is clearly bcoz ur reference images don’t match.

from side (righ hand view) looks good when i rotate it looks shapeless

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In your reference images you can see that the white base of the shoes are not in proportion to each other. That is why if you model from a certain view you are not able to match it from the other view. The best solution is to either have proper reference or guess work while modelling.