India has several large ships, particularly in the naval and merchant fleet. Here are some of the notable ones, although please note that this information might have changed since then

INS Vikramaditya (R33)

INS Vikrant (IAC-1)

INS Vikrant (IAC-1)

MV SSL Kolkata

MV SSL Kolkata

INS Jalashwa (L41)

INS Jalashwa (L41)

INS Chakra (A74)

INS Chakra (A74)

Vikrant-class Aircraft Carriers (future)

Merchant Container Ship

Merchant Oil Tanker

Merchant Oil Tanker

Merchant Bulk Carrier

Merchant LPG Carrier

the specific rankings and sizes of these ships might have changed

It's advisable to consult the latest sources or maritime authorities for the most up-to-date information on the biggest ships in India.