Delay-Tolerant Networks (DTNs) operate in environments that are generally attributed by severe limitations such as intermittent connectivity. The DTN architecture handles such limitations with the help of store, carry, and forward paradigm, wherein the nodes physically carry the messages until they meet the destination. Underlying this paradigm is the node’s buffer space that becomes a costly real estate. Unless this buffer space is properly quantified, the routing performance would severely degrade.The DTN routing protocols that embody this paradigm would also resort to replication based strategies, in which multiple nodes carry the replica of the message. This is done in order to increase the delivery probability. Moreover, it inherently reduces the buffer loss at the source nodes when compared with the no relay nodes scenario. It would be interesting to investigate a way to quantify the buffer size and also perceive the reduction in buffer size of the source node with an increase in the number of relay nodes.