What's Russian Dwarf Hamsters Lifespan? It's best to put this into consideration when getting a pet hamster. Usually, hamsters have a brief lifespan. That their lifespan averages 2 years doesn’t imply it won’t die before 1 or 2 years. Nevertheless, if you possibly can prolong the longevity of your dwarf hamsters how big can syrian hamsters grow by how well you care for them. With proper care and constant remedy from a vet. Your hamsters can not only reside longer but additionally stay wholesome, fun, and completely happy.