diff --git a/UAT_PLAYBOOK.md b/UAT_PLAYBOOK.md
index 8fff09a..655c505 100644
--- a/UAT_PLAYBOOK.md
+++ b/UAT_PLAYBOOK.md
@@ -202,6 +202,20 @@ export const { signIn, signOut, useSession, changePassword } = authClient;
 | TC-WEB-5.18.12 | Medical alert validation | Click Edit, add alert with empty type, try to save | Error "Type is required"; form not submitted |
 | TC-WEB-5.18.13 | Temperament fields read-only | View edit form for pet with temperament data | Temperament score and flags not editable (display only) |
 
+### 5.19 Booking Wizard — Pet Size & Coat (GRO-1174)
+
+| # | Scenario | Steps | Expected |
+|---|----------|-------|----------|
+| TC-WEB-5.19.1 | Pet size dropdown visible | Step 3 of booking wizard (pet details) | Pet size dropdown shown after breed field with options: Small, Medium, Large, X-Large |
+| TC-WEB-5.19.2 | Coat type dropdown visible | Step 3 of booking wizard | Coat type dropdown shown after pet size with options: Smooth, Double, Curly, Wire, Long, Hairless |
+| TC-WEB-5.19.3 | Size/coat pre-fill from URL | Navigate to booking with `?petSizeCategory=large&petCoatType=curly` | Fields pre-filled with provided values |
+| TC-WEB-5.19.4 | Size/coat optional | Proceed through booking without selecting size/coat | Booking completes successfully |
+| TC-WEB-5.19.5 | Confirmation shows appointment duration | Confirm booking step | Service duration shown as "X min appointment" (buffer not exposed) |
+| TC-WEB-5.19.6 | Confirmation shows pet size/coat | Confirm booking with size/coat selected | Size and coat type shown on pet card in confirmation |
+| TC-WEB-5.19.7 | Availability uses buffer for large/x-large | Select large or x-large size, check availability | Availability slots reflect service duration + buffer for large/x-large |
+| TC-WEB-5.19.8 | Form reset clears size/coat | Complete booking, click "Book another" | Size and coat fields reset to empty |
+| TC-WEB-5.19.9 | New pet record has size/coat | Complete booking, view created pet in admin | Pet record shows selected size and coat type |
+
 ## 6. Pass/Fail Criteria
 
 **Pass:**