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There is no B1 series sizes of virtual machine in my account. how would i solve this issue?

akorede jeleel 0 Reputation points
2026-05-19T10:32:30.2033333+00:00

Am having issue with my virtual machine whereby in the sizes there is no B1 series in it. Thus, i found it difficult as a student to be to practice what have a learnt so far.

Thanks for your anticipation,

Akorede jeleel

Azure Virtual Machines
Azure Virtual Machines

An Azure service that is used to provision Windows and Linux virtual machines.

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  1. Jilakara Hemalatha 13,750 Reputation points Microsoft External Staff Moderator
    2026-05-19T10:41:29.8333333+00:00

    Hello Akorede,

    Thank you for reaching out Q/A.

    Please note that the Standard_B1s VM size is gradually being retired and is currently available only in limited quantities across certain Azure regions. Microsoft recommends using the newer Bsv2-series VM sizes where possible.

    https://azure.microsoft.com/en-us/explore/global-infrastructure/products-by-region/table

    You can verify the VM SKU availability by running the following Azure CLI command:

    az vm list-skus --location westus --size Standard_B1s --output table

    If you see any restrictions in the output table, for example NotAvailableForSubscription then you won't be able to create the VM using that VM size in the region

    User's image

    If you want to check which regions don't have restrictions for your subscription, you can run the following command. It will return a JSON output, which you can paste into a code editor and search for regions without restrictions where you can create B1s-sized VMs.

    az vm list-skus --resource-type virtualMachines --all --query "[?name=='Standard_B1s'].{
     Name: name,
     Locations: locations,
     Restrictions: restrictions
 }" --output json

    The command returns a JSON output which can be reviewed in a code editor to identify regions without deployment restrictions.

    As an alternative, we recommend trying the newer Bsv2-series VM sizes, which are intended to replace the older B1s series and provide improved availability.

    Reference: https://docs.azure.cn/en-us/virtual-machines/sizes/general-purpose/b-family?

    https://docs.azure.cn/en-us/virtual-machines/sizes/general-purpose/bsv2-series?

    Announcing public preview of new burstable VMs - Bsv2, Basv2 and Bpsv2

    Hope this helps! Please let me know if you have any queries in comments.

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  2. AI answer

    2026-05-19T10:32:45.4833333+00:00

    B1 sizes (for example Standard_B1ls, Standard_B1s, Standard_B1ms) are part of the older Bv1-series, which is a previous-generation VM family. These sizes are still documented but are not guaranteed to be available in every subscription, region, or hardware cluster.

    If B1 sizes do not appear in the size picker for a VM, it typically means one or more of the following:

    1. The region or cluster where the VM is deployed no longer offers that older Bv1 size.
    2. The subscription or offer type does not expose those legacy sizes.
    3. Capacity for that size in that region is exhausted or restricted.

    Because Bv1 is a previous generation, the recommended path is to use the newer B-family sizes (for example, Bsv2-series) instead of trying to force B1 availability.

    From the context:

    • Bv1-series (which includes Standard_B1ls, Standard_B1s, Standard_B1ms, etc.) is explicitly marked as a previous generation series and newer generations are recommended for improved performance and security.
    • B-family in general is designed for burstable workloads using a CPU credit model, so newer B-family sizes (such as Bsv2-series) will still give similar “burstable” behavior suitable for student and learning scenarios.

    To proceed in practice:

    1. When creating or resizing a VM, select a newer B-family size that is available in the chosen region (for example, any of the Bsv2-series sizes that appear in the list).
    2. If a specific B1 size is required for a lab or course, move the VM to or recreate it in a region where that Bv1 size is still offered; if it still does not appear, use the closest available B-family size and proceed with the lab, since the behavior (burstable CPU with credits) is conceptually the same.

    References:

    AI-generated content may be incorrect. Read our transparency notes for more information.

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