diff --git a/src/aind_behavior_services/common.py b/src/aind_behavior_services/common.py
index cf33974..7e63bb9 100644
--- a/src/aind_behavior_services/common.py
+++ b/src/aind_behavior_services/common.py
@@ -19,6 +19,15 @@ class Rect(BaseModel):
     height: int = Field(default=0, ge=0, description="Height of the rectangle")
 
 
+class Size(BaseModel):
+    """
+    Represents 2D dimensions with width and height.
+    """
+
+    width: float = Field(default=0, description="Width of the texture")
+    height: float = Field(default=0, description="Height of the texture")
+
+
 class Circle(BaseModel):
     """Represents a circle defined by its center point and radius."""
 
@@ -26,6 +35,15 @@ class Circle(BaseModel):
     radius: float = Field(default=1, ge=0, description="Radius of the circle (px)")
 
 
+class Vector2(BaseModel):
+    """
+    Represents a 2D vector with float coordinates.
+    """
+
+    x: float = Field(default=0, description="X coordinate of the vector")
+    y: float = Field(default=0, description="Y coordinate of the vector")
+
+
 class Vector3(BaseModel):
     """Represents a 3D vector with float coordinates."""