diff --git a/src/Volo.Abp.AspNetCore.Mvc.UI.Bootstrap/TagHelpers/Button/AbpButtonSizeExtensions.cs b/src/Volo.Abp.AspNetCore.Mvc.UI.Bootstrap/TagHelpers/Button/AbpButtonSizeExtensions.cs
index f4ad7c7acd..79ec7c0d10 100644
--- a/src/Volo.Abp.AspNetCore.Mvc.UI.Bootstrap/TagHelpers/Button/AbpButtonSizeExtensions.cs
+++ b/src/Volo.Abp.AspNetCore.Mvc.UI.Bootstrap/TagHelpers/Button/AbpButtonSizeExtensions.cs
@@ -13,7 +13,7 @@
                 case AbpButtonSize.Default:
                     return "";
                 default:
-                    throw new AbpException("Unknown AbpButtonSize: " + size);
+                    throw new AbpException($"Unknown {nameof(AbpButtonSize)}: {size}");
             }
         }
     }
diff --git a/src/Volo.Abp.AspNetCore.Mvc.UI.Bootstrap/TagHelpers/Form/AbpInputTagHelper.cs b/src/Volo.Abp.AspNetCore.Mvc.UI.Bootstrap/TagHelpers/Form/AbpInputTagHelper.cs
index fee222f934..6b7c32d05f 100644
--- a/src/Volo.Abp.AspNetCore.Mvc.UI.Bootstrap/TagHelpers/Form/AbpInputTagHelper.cs
+++ b/src/Volo.Abp.AspNetCore.Mvc.UI.Bootstrap/TagHelpers/Form/AbpInputTagHelper.cs
@@ -10,6 +10,9 @@ namespace Volo.Abp.AspNetCore.Mvc.UI.Bootstrap.TagHelpers.Form
 
         public string Label { get; set; }
 
+        [HtmlAttributeName("disabled")]
+        public bool IsDisabled { get; set; }
+
         [HtmlAttributeNotBound]
         [ViewContext]
         public ViewContext ViewContext { get; set; }
diff --git a/src/Volo.Abp.AspNetCore.Mvc.UI.Bootstrap/TagHelpers/Form/AbpInputTagHelperService.cs b/src/Volo.Abp.AspNetCore.Mvc.UI.Bootstrap/TagHelpers/Form/AbpInputTagHelperService.cs
index 4168d1fd86..147ec9cf48 100644
--- a/src/Volo.Abp.AspNetCore.Mvc.UI.Bootstrap/TagHelpers/Form/AbpInputTagHelperService.cs
+++ b/src/Volo.Abp.AspNetCore.Mvc.UI.Bootstrap/TagHelpers/Form/AbpInputTagHelperService.cs
@@ -25,7 +25,13 @@ namespace Volo.Abp.AspNetCore.Mvc.UI.Bootstrap.TagHelpers.Form
 
             var order = GetInputOrder(TagHelper.AspFor.ModelExplorer);
 
-            AddGroupToFormGroupContents(context, TagHelper.AspFor.Name, SurroundInnerHtmlAndGet(context, output, innerHtml, isCheckbox), order, out var surpress);
+            AddGroupToFormGroupContents(
+                context,
+                TagHelper.AspFor.Name,
+                SurroundInnerHtmlAndGet(context, output, innerHtml, isCheckbox),
+                order,
+                out var surpress
+            );
 
             if (surpress)
             {
@@ -89,9 +95,14 @@ namespace Volo.Abp.AspNetCore.Mvc.UI.Bootstrap.TagHelpers.Form
             };
 
             var inputTagHelperOutput = GetInnerTagHelper(new TagHelperAttributeList(), context, inputTagHelper, "input");
-            isCheckbox = IsInputCheckbox(context, output,inputTagHelperOutput.Attributes);
 
-            inputTagHelperOutput.Attributes.Add("class", isCheckbox ? "form-check-input" : "form-control");
+            if (!inputTagHelperOutput.Attributes.ContainsName("disabled") && TagHelper.IsDisabled)
+            {
+                inputTagHelperOutput.Attributes.Add("disabled", "true");
+            }
+
+            isCheckbox = IsInputCheckbox(context, output, inputTagHelperOutput.Attributes);
+            inputTagHelperOutput.Attributes.AddClass(isCheckbox ? "form-check-input" : "form-control");
 
             return inputTagHelperOutput;
         }
@@ -111,7 +122,7 @@ namespace Volo.Abp.AspNetCore.Mvc.UI.Bootstrap.TagHelpers.Form
             var checkboxClass = isCheckbox ? "class=\"form-check-label\" " : "";
 
             return "<label " + checkboxClass + GetIdAttributeAsString(inputTag) + ">"
-                   + GetLabelValue(context,output) +
+                   + GetLabelValue(context, output) +
                    "</label>";
         }
 
diff --git a/src/Volo.Abp.AspNetCore.Mvc.UI.Bootstrap/TagHelpers/Modal/AbpModalSize.cs b/src/Volo.Abp.AspNetCore.Mvc.UI.Bootstrap/TagHelpers/Modal/AbpModalSize.cs
new file mode 100644
index 0000000000..ce33f4e073
--- /dev/null
+++ b/src/Volo.Abp.AspNetCore.Mvc.UI.Bootstrap/TagHelpers/Modal/AbpModalSize.cs
@@ -0,0 +1,9 @@
+namespace Volo.Abp.AspNetCore.Mvc.UI.Bootstrap.TagHelpers.Modal
+{
+    public enum AbpModalSize
+    {
+        Default,
+        Small,
+        Large
+    }
+}
\ No newline at end of file
diff --git a/src/Volo.Abp.AspNetCore.Mvc.UI.Bootstrap/TagHelpers/Modal/AbpModalSizeExtensions.cs b/src/Volo.Abp.AspNetCore.Mvc.UI.Bootstrap/TagHelpers/Modal/AbpModalSizeExtensions.cs
new file mode 100644
index 0000000000..ca58dd918e
--- /dev/null
+++ b/src/Volo.Abp.AspNetCore.Mvc.UI.Bootstrap/TagHelpers/Modal/AbpModalSizeExtensions.cs
@@ -0,0 +1,20 @@
+namespace Volo.Abp.AspNetCore.Mvc.UI.Bootstrap.TagHelpers.Modal
+{
+    public static class AbpModalSizeExtensions
+    {
+        public static string ToClassName(this AbpModalSize size)
+        {
+            switch (size)
+            {
+                case AbpModalSize.Small:
+                    return "modal-sm";
+                case AbpModalSize.Large:
+                    return "modal-lg";
+                case AbpModalSize.Default:
+                    return "";
+                default:
+                    throw new AbpException($"Unknown {nameof(AbpModalSize)}: {size}");
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/Volo.Abp.AspNetCore.Mvc.UI.Bootstrap/TagHelpers/Modal/AbpModalTagHelper.cs b/src/Volo.Abp.AspNetCore.Mvc.UI.Bootstrap/TagHelpers/Modal/AbpModalTagHelper.cs
index 025a861718..5524f221ff 100644
--- a/src/Volo.Abp.AspNetCore.Mvc.UI.Bootstrap/TagHelpers/Modal/AbpModalTagHelper.cs
+++ b/src/Volo.Abp.AspNetCore.Mvc.UI.Bootstrap/TagHelpers/Modal/AbpModalTagHelper.cs
@@ -2,6 +2,8 @@
 {
     public class AbpModalTagHelper : AbpTagHelper<AbpModalTagHelper, AbpModalTagHelperService>
     {
+        public AbpModalSize Size { get; set; } = AbpModalSize.Default;
+
         public AbpModalTagHelper(AbpModalTagHelperService tagHelperService)
             : base(tagHelperService)
         {
diff --git a/src/Volo.Abp.AspNetCore.Mvc.UI.Bootstrap/TagHelpers/Modal/AbpModalTagHelperService.cs b/src/Volo.Abp.AspNetCore.Mvc.UI.Bootstrap/TagHelpers/Modal/AbpModalTagHelperService.cs
index 4abb99b5f4..7c854baef1 100644
--- a/src/Volo.Abp.AspNetCore.Mvc.UI.Bootstrap/TagHelpers/Modal/AbpModalTagHelperService.cs
+++ b/src/Volo.Abp.AspNetCore.Mvc.UI.Bootstrap/TagHelpers/Modal/AbpModalTagHelperService.cs
@@ -16,13 +16,36 @@ namespace Volo.Abp.AspNetCore.Mvc.UI.Bootstrap.TagHelpers.Modal
         {
             var sb = new StringBuilder();
 
-            sb.AppendLine("<div class=\"modal fade\" tabindex=\"-1\" role=\"dialog\" aria-hidden=\"true\">");
-            sb.AppendLine("    <div class=\"modal-dialog\" role=\"document\">");
-            sb.AppendLine("        <div class=\"modal-content\">");
+            sb.AppendLine("<div class=\""+ GetModalClasses() + "\" tabindex=\"-1\" role=\"dialog\" aria-hidden=\"true\">");
+            sb.AppendLine("    <div class=\"" + GetModalDialogClasses() + "\" role=\"document\">");
+            sb.AppendLine("        <div class=\"" + GetModalContentClasses() + "\">");
 
             return sb.ToString();
         }
 
+        protected virtual string GetModalClasses()
+        {
+            return "modal fade";
+        }
+
+        protected virtual string GetModalDialogClasses()
+        {
+            var classNames = new StringBuilder("modal-dialog");
+
+            if (TagHelper.Size != AbpModalSize.Default)
+            {
+                classNames.Append(" ");
+                classNames.Append(TagHelper.Size.ToClassName());
+            }
+
+            return classNames.ToString();
+        }
+
+        protected virtual string GetModalContentClasses()
+        {
+            return "modal-content";
+        }
+
         protected virtual string CreatePostContent()
         {
             var sb = new StringBuilder();