diff --git a/dev-docs/bidders/sharethrough.md b/dev-docs/bidders/sharethrough.md
index b8f4792c65..df0d2bc85e 100644
--- a/dev-docs/bidders/sharethrough.md
+++ b/dev-docs/bidders/sharethrough.md
@@ -21,3 +21,5 @@ The Sharethrough bidder adapter requires additional setup and approval from the
 | Name | Scope | Description | Example |
 | :--- | :---- | :---------- | :------ |
 | `pkey` | required | The placement key | `'DfFKxpkRGPMS7A9f71CquBgZ'` |
+| `iframe` | optional | If `true`, the ad will render in an iframe. Defaults to `false`. | `true` |
+| `iframeSize` | optional | `[width, height]` If provided, use this size for the iframe size. Only applicable if `iframe` is `true`. If omitted, the largest size from the ad unit sizes array will be used.   | `[300, 250]` |