it's okay 192MB JVM Heap Size for a java web system?

I'm implementing a java web system (with Apache Tomcat 8 hibernate, spring and mysql) and have given me the option of hosting with 192MB JVM Heap Size, the system makes simple queries and turnout will be around 50 people okay that option? PDT: Also I have another option that has JVM Heap Size 288MB but obviously more expensive. Thank You