The amount of money that you can easily repay to your home loan lender within the time period is the safest amount for you. So, there is no fixed loan amount that is safe for each and every applicant. It will differ from person to person.
However, it is always better to apply for a home loan lesser than your actual capacity. You should always remember that you have to repay the principal amount as well as the interest charged by the lender. So, your repayment will be much higher than what you are applying. To be in the safe side, try to keep a buffer space while applying for a home loan.