diff --git a/MVMCoreUI/Atoms/Buttons/CaretButton.swift b/MVMCoreUI/Atoms/Buttons/CaretButton.swift
index 46c6d3f4..4ca750c6 100644
--- a/MVMCoreUI/Atoms/Buttons/CaretButton.swift
+++ b/MVMCoreUI/Atoms/Buttons/CaretButton.swift
@@ -139,4 +139,8 @@ open class CaretButton: MFCustomButton, MVMCoreUIMoleculeViewProtocol, MVMCoreUI
     open func alignment() -> UIStackView.Alignment {
         return UIStackView.Alignment.leading;
     }
+    
+    public static func estimatedHeight(forRow json: [AnyHashable : Any]?, delegateObject: MVMCoreUIDelegateObject?) -> CGFloat {
+        return 10
+    }
 }
diff --git a/MVMCoreUI/Atoms/Buttons/MFTextButton.m b/MVMCoreUI/Atoms/Buttons/MFTextButton.m
index 336db92a..e1a6c504 100644
--- a/MVMCoreUI/Atoms/Buttons/MFTextButton.m
+++ b/MVMCoreUI/Atoms/Buttons/MFTextButton.m
@@ -146,6 +146,10 @@
     }
 }
 
++ (CGFloat)estimatedHeightForRow:(NSDictionary *)json delegateObject:(MVMCoreUIDelegateObject *)delegateObject {
+    return 31;
+}
+
 #pragma mark - MVMCoreUIViewConstrainingProtocol
 
 - (BOOL)needsToBeConstrained {
diff --git a/MVMCoreUI/Atoms/Views/MFLoadImageView.swift b/MVMCoreUI/Atoms/Views/MFLoadImageView.swift
index 795dea86..703ffd65 100644
--- a/MVMCoreUI/Atoms/Views/MFLoadImageView.swift
+++ b/MVMCoreUI/Atoms/Views/MFLoadImageView.swift
@@ -184,6 +184,10 @@ import UIKit
         addSizeConstraintsForAspectRatio = true
     }
     
+    public override static func estimatedHeight(forRow json: [AnyHashable : Any]?, delegateObject: MVMCoreUIDelegateObject?) -> CGFloat {
+        return json?.optionalCGFloatForKey("height") ?? 0
+    }
+    
     open override func setWithJSON(_ json: [AnyHashable: Any]?, delegateObject: MVMCoreUIDelegateObject?, additionalData: [AnyHashable: Any]?) {
         super.setWithJSON(json, delegateObject: delegateObject, additionalData: additionalData)
         if let accessibilityString = json?.optionalStringForKey("accessibilityText") {
diff --git a/MVMCoreUI/Atoms/Views/MVMCoreUICheckBox.m b/MVMCoreUI/Atoms/Views/MVMCoreUICheckBox.m
index 9db9285b..2cde1bc3 100644
--- a/MVMCoreUI/Atoms/Views/MVMCoreUICheckBox.m
+++ b/MVMCoreUI/Atoms/Views/MVMCoreUICheckBox.m
@@ -78,6 +78,9 @@ static const CGFloat CheckBoxHeightWidth = 18.0;
                  additionalData: additionalData];
 }
 
++ (CGFloat)estimatedHeightForRow:(NSDictionary *)json delegateObject:(MVMCoreUIDelegateObject *)delegateObject {
+    return CheckBoxHeightWidth;
+}
 
 #pragma mark - convenient class methods
 
diff --git a/MVMCoreUI/Atoms/Views/MVMCoreUISwitch.h b/MVMCoreUI/Atoms/Views/MVMCoreUISwitch.h
index 8c42f5e5..5591f595 100644
--- a/MVMCoreUI/Atoms/Views/MVMCoreUISwitch.h
+++ b/MVMCoreUI/Atoms/Views/MVMCoreUISwitch.h
@@ -31,4 +31,6 @@ typedef void(^ValueChangeBlock)(void);
 // Sets the state without triggering the value changed block.
 - (void)setState:(BOOL)stateWithoutBlock withoutBlockAnimated:(BOOL)animated;
 
++ (CGFloat)getSwitchHeight;
+
 @end
diff --git a/MVMCoreUI/Atoms/Views/SeparatorView.m b/MVMCoreUI/Atoms/Views/SeparatorView.m
index a92c252b..2d01e6d2 100644
--- a/MVMCoreUI/Atoms/Views/SeparatorView.m
+++ b/MVMCoreUI/Atoms/Views/SeparatorView.m
@@ -70,10 +70,6 @@
 
 #pragma mark - set up
 
-- (void)reset {
-    [self setAsLight];
-}
-
 - (void)updateView:(CGFloat)size {
     [super updateView:size];
     self.height.constant = [self.heightSizeObject getValueBasedOnSize:size];
@@ -163,6 +159,10 @@
 }
     
 #pragma mark - Molecule
+
+- (void)reset {
+    [self setAsLight];
+}
     
 - (BOOL)needsToBeConstrained {
     return YES;
@@ -172,4 +172,19 @@
     return NO;
 }
 
++ (CGFloat)estimatedHeightForRow:(NSDictionary *)json delegateObject:(MVMCoreUIDelegateObject *)delegateObject {
+    NSString *type = [json string:KeyType];
+    if ([type isEqualToString:@"none"]) {
+        return 0;
+    } else {
+        if ([type isEqualToString:@"medium"]) {
+            return 2;
+        } else if ([type isEqualToString:@"heavy"]) {
+            return 4;
+        } else {
+            return 1;
+        }
+    }
+}
+
 @end
diff --git a/MVMCoreUI/Molecules/ModuleMolecule.swift b/MVMCoreUI/Molecules/ModuleMolecule.swift
index f160acda..3478c9ab 100644
--- a/MVMCoreUI/Molecules/ModuleMolecule.swift
+++ b/MVMCoreUI/Molecules/ModuleMolecule.swift
@@ -53,7 +53,7 @@ open class ModuleMolecule: ViewConstrainingView {
             // Critical error
             return 0
         }
-        return MVMCoreUIMoleculeMappingObject.shared()?.getMoleculeClass(withJSON: module)?.estimatedHeight?(forRow: module, delegateObject: delegateObject) ?? 80
+        return MVMCoreUIMoleculeMappingObject.shared()?.getMoleculeClass(withJSON: module)?.estimatedHeight?(forRow: module, delegateObject: delegateObject) ?? 0
     }
     
     public override static func name(forReuse molecule: [AnyHashable : Any]?, delegateObject: MVMCoreUIDelegateObject?) -> String? {
diff --git a/MVMCoreUI/Molecules/MoleculeStackView.swift b/MVMCoreUI/Molecules/MoleculeStackView.swift
index 869dda5d..3183800f 100644
--- a/MVMCoreUI/Molecules/MoleculeStackView.swift
+++ b/MVMCoreUI/Molecules/MoleculeStackView.swift
@@ -218,8 +218,25 @@ public class MoleculeStackView: ViewConstrainingView {
     }
     
     public override static func estimatedHeight(forRow json: [AnyHashable : Any]?, delegateObject: MVMCoreUIDelegateObject?) -> CGFloat {
-        // if horizontal, max, if vertical, append.
-        return 100
+        guard let items = json?.optionalArrayForKey(KeyMolecules) else {
+            return 0
+        }
+        let horizontal = json?.optionalStringForKey("axis") == "horizontal"
+        var estimatedHeight: CGFloat = 0
+        for case let item as [AnyHashable: AnyHashable] in items {
+            if let molecule = item.optionalDictionaryForKey(KeyMolecule) {
+                let height = MVMCoreUIMoleculeMappingObject.shared()?.getMoleculeClass(withJSON: molecule)?.estimatedHeight?(forRow: molecule, delegateObject: delegateObject)
+                if !horizontal {
+                    // Vertical stack aggregates the items
+                    let spacing = item.optionalCGFloatForKey("spacing") ?? (estimatedHeight != 0 ? (json?.optionalCGFloatForKey("spacing") ?? 16) : 0)
+                    estimatedHeight += ((height ?? 0) + spacing)
+                } else if let height = height {
+                    // Horizontal stack takes the tallest item.
+                    estimatedHeight = max(estimatedHeight, height)
+                }
+            }
+        }
+        return estimatedHeight
     }
     
     public override static func requiredModules(_ json: [AnyHashable : Any]?, delegateObject: MVMCoreUIDelegateObject?, error: AutoreleasingUnsafeMutablePointer<MVMCoreErrorObject?>?) -> [String]? {
diff --git a/MVMCoreUI/Molecules/MoleculeTableViewCell.swift b/MVMCoreUI/Molecules/MoleculeTableViewCell.swift
index f8fc00fa..fc681c12 100644
--- a/MVMCoreUI/Molecules/MoleculeTableViewCell.swift
+++ b/MVMCoreUI/Molecules/MoleculeTableViewCell.swift
@@ -131,7 +131,7 @@ import UIKit
         guard let moleculeJSON = json?.optionalDictionaryForKey(KeyMolecule), let height = MVMCoreUIMoleculeMappingObject.shared()?.getMoleculeClass(withJSON: moleculeJSON)?.estimatedHeight?(forRow: moleculeJSON, delegateObject: delegateObject) else {
                 return 80
         }
-        return height
+        return max(80, height)
     }
     
     public static func name(forReuse molecule: [AnyHashable: Any]?, delegateObject: MVMCoreUIDelegateObject?) -> String? {
diff --git a/MVMCoreUI/Molecules/StandardFooterView.swift b/MVMCoreUI/Molecules/StandardFooterView.swift
index b99ad5d0..21c70a7f 100644
--- a/MVMCoreUI/Molecules/StandardFooterView.swift
+++ b/MVMCoreUI/Molecules/StandardFooterView.swift
@@ -103,4 +103,8 @@ public class StandardFooterView: ViewConstrainingView {
         twoButtonView.reset()
         textButton.reset()
     }
+    
+    public override static func estimatedHeight(forRow json: [AnyHashable : Any]?, delegateObject: MVMCoreUIDelegateObject?) -> CGFloat {
+        return 42
+    }
 }
diff --git a/MVMCoreUI/Molecules/StandardHeaderView.swift b/MVMCoreUI/Molecules/StandardHeaderView.swift
index b9639f07..2440656f 100644
--- a/MVMCoreUI/Molecules/StandardHeaderView.swift
+++ b/MVMCoreUI/Molecules/StandardHeaderView.swift
@@ -111,14 +111,6 @@ public class StandardHeaderView: ViewConstrainingView {
         separatorView?.rightPin?.constant = constant
     }
     
-    open override func reset() {
-        backgroundColor = .clear
-        headlineLabel.styleH2(true)
-        messageLabel.styleB2(true)
-        separatorView?.setAsHeavy()
-        separatorView?.show()
-    }
-    
     // MARK: - MVMCoreUIMoleculeViewProtocol
     open override func setWithJSON(_ json: [AnyHashable: Any]?, delegateObject: MVMCoreUIDelegateObject?, additionalData: [AnyHashable: Any]?) {
         super.setWithJSON(json, delegateObject: delegateObject, additionalData: additionalData)
@@ -143,4 +135,16 @@ public class StandardHeaderView: ViewConstrainingView {
             bottomPin?.constant = PaddingDefaultVerticalSpacing
         }
     }
+    
+    open override func reset() {
+        backgroundColor = .clear
+        headlineLabel.styleH2(true)
+        messageLabel.styleB2(true)
+        separatorView?.setAsHeavy()
+        separatorView?.show()
+    }
+    
+    public override static func estimatedHeight(forRow json: [AnyHashable : Any]?, delegateObject: MVMCoreUIDelegateObject?) -> CGFloat {
+        return 121
+    }
 }
diff --git a/MVMCoreUI/Molecules/Switch.swift b/MVMCoreUI/Molecules/Switch.swift
index a8bb00ba..5b23b1d5 100644
--- a/MVMCoreUI/Molecules/Switch.swift
+++ b/MVMCoreUI/Molecules/Switch.swift
@@ -83,5 +83,9 @@ import UIKit
     public override func alignment() -> UIStackView.Alignment {
         return UIStackView.Alignment.leading
     }
+    
+    public override static func estimatedHeight(forRow json: [AnyHashable : Any]?, delegateObject: MVMCoreUIDelegateObject?) -> CGFloat {
+        return MVMCoreUISwitch.getHeight()
+    }
 }