containers: document custom instance types

src/content/changelog/containers/2026-01-05-custom-instance-types.mdx

@@ -0,0 +1,22 @@
+---
+title: Custom container instance types now available for all users
+description: Configure custom vCPU, memory, and disk allocations for your container instances
+products:
+  - containers
+date: 2026-01-05
+---
+
+Custom instance types are now enabled for all [Cloudflare Containers](/containers) users. You can now specify specific vCPU, memory, and disk amounts, rather than being limited to pre-defined [instance types](/containers/platform-details/limits/#instance-types). Previously, only select Enterprise customers were able to customize their instance type.
+
+To use a custom instance type, specify the `instance_type` property as an object with `vcpu`, `memory_mib`, and `disk_mb` fields in your Wrangler configuration:
+
+```toml
+[[containers]]
+image = "./Dockerfile"
+instance_type = { vcpu = 2, memory_mib = 6144, disk_mb = 12000 }
+```
+
+Individual limits for custom instance types are based on the `standard-4` instance type (4 vCPU, 12 GiB memory, 20 GB disk). You must allocate at least 1 vCPU for custom instance types. For workloads requiring less than 1 vCPU, use the predefined instance types like `lite` or `basic`.
+
+See the [limits documentation](/containers/platform-details/limits/#custom-instance-types) for the full list of constraints on custom instance types.
+See the [getting started guide](/containers/get-started/) to deploy your first Container,

src/content/docs/containers/platform-details/limits.mdx

@@ -14,12 +14,31 @@ Six instance types are currently available:
 
 <Render product="containers" file="instance-types" />
 
-These are specified using the [`instance_type` property](/workers/wrangler/configuration/#containers) in your Worker's Wrangler configuration file. Looking for larger instances? [Give us feedback here](/containers/beta-info/#feedback-wanted) and tell us what size instances you need, and what you want to use them for.
+These are specified using the [`instance_type` property](/workers/wrangler/configuration/#containers) in your Worker's Wrangler configuration file.
 
 :::note
 The `dev` and `standard` instance types are preserved for backward compatibility and are aliases for `lite` and `standard-1`, respectively.
 :::
 
+### Custom Instance Types
+
+In addition to the predefined instance types, you can configure custom instance types by specifying `vcpu`, `memory_mib`, and `disk_mb` values. See the [Wrangler configuration documentation](/workers/wrangler/configuration/#custom-instance-types) for configuration details.
+
+Custom instance types have the following constraints:
+
+| Resource             | Limit                               |
+| -------------------- | ----------------------------------- |
+| Minimum vCPU         | 1                                   |
+| Maximum vCPU         | 4                                   |
+| Maximum Memory       | 12 GiB                              |
+| Maximum Disk         | 20 GB                               |
+| Memory to vCPU ratio | Minimum 3 GiB memory per vCPU       |
+| Disk to Memory ratio | Maximum 2 GB disk per 1 GiB memory  |
+
+For workloads requiring less than 1 vCPU, use the predefined instance types such as `lite` or `basic`.
+
+Looking for larger instances? [Give us feedback here](/containers/beta-info/#feedback-wanted) and tell us what size instances you need, and what you want to use them for.
+
 ## Limits
 
 While in open beta, the following limits are currently in effect:

src/content/docs/workers/wrangler/configuration.mdx

@@ -1071,12 +1071,8 @@
 
 ### Custom Instance Types
 
-:::note
-For Enterprise customers only.
-:::
-
-In place of the [named instance types](/containers/platform-details#instance-types), you can set a custom instance type by
-individually configuring vCPU, memory, and disk.
+In place of the [named instance types](/containers/platform-details/limits/#instance-types), you can set a custom instance type by individually configuring vCPU, memory, and disk.
+See the [limits documentation](/containers/platform-details/limits/#custom-instance-types) for constraints on custom instance types.
 
 The following options are available:
 
@@ -1087,7 +1083,7 @@
   - The memory to be used by your container, in MiB. Defaults to `256`.
 
 - `disk_mb` <Type text="number" /> <MetaInfo text="optional" />
   - The disk to be used by your container, in MB. Defaults to `2000` (2GB).
 
 <WranglerConfig>