db.x2g.large is an Amazon Neptune size with 2 vCPUs, 32 GiB memory (AWS Graviton2). In US East (N. Virginia) it costs $0.5472 per hour on demand ($399.46 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.