db.x2g.xlarge is an Amazon Neptune size with 4 vCPUs, 64 GiB memory (AWS Graviton2). In US East (N. Virginia) it costs $1.094 per hour on demand ($798.84 per month) for Standard storage. It is sold in 4 regions.
Prices by region
USD per hour, Standard storage. Reserved prices are no upfront, standard. Cheapest on-demand first.