{
    "$schema": "http://schema.management.azure.com/schemas/2015-01-01/deploymentTemplate.json",
    "contentVersion": "1.0.0.0",
    "parameters": {
        "adminPassword": {
            "value": "changeme"
        },
        "authenticationType": {
            "value": "password"
        },
        "newStorageAccountName": {
            "value": "changeme"
        },
        "offer": {
            "value": "R7710BYOL"
        },
        "sshPublicKey": {
            "value": ""
        },
        "vmName": {
            "value": "changeme"
        },
        "vmSize": {
            "value": "Standard_D2"
        }
    }
}

{
    "$schema": "http://schema.management.azure.com/schemas/2015-01-01/deploymentTemplate.json",
    "contentVersion": "1.0.0.0",
    "parameters": {
        "adminPassword": {
            "value": "changeme"
        },
        "authenticationType": {
            "value": "password"
        },
        "newStorageAccountName": {
            "value": "changeme"
        },
        "offer": {
            "value": "R7710BYOL"
        },
        "sshPublicKey": {
            "value": ""
        },
        "vmName": {
            "value": "changeme"
        },
        "vmSize": {
            "value": "Standard_D3"
        }
    }
}

Change default vmSize to Standard_D3
Change default vmSize to Standard_D3
