diff --git a/OpenTween.Tests/SocialProtocol/Twitter/TwitterProfileImageUriTest.cs b/OpenTween.Tests/SocialProtocol/Twitter/TwitterProfileImageUriTest.cs
new file mode 100644
index 000000000..cfe0c049f
--- /dev/null
+++ b/OpenTween.Tests/SocialProtocol/Twitter/TwitterProfileImageUriTest.cs
@@ -0,0 +1,93 @@
+// OpenTween - Client of Twitter
+// Copyright (c) 2024 kim_upsilon (@kim_upsilon) <https://upsilo.net/~upsilon/>
+// All rights reserved.
+//
+// This file is part of OpenTween.
+//
+// This program is free software; you can redistribute it and/or modify it
+// under the terms of the GNU General Public License as published by the Free
+// Software Foundation; either version 3 of the License, or (at your option)
+// any later version.
+//
+// This program is distributed in the hope that it will be useful, but
+// WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+// or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+// for more details.
+//
+// You should have received a copy of the GNU General Public License along
+// with this program. If not, see <http://www.gnu.org/licenses/>, or write to
+// the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
+// Boston, MA 02110-1301, USA.
+
+using System;
+using Xunit;
+
+namespace OpenTween.SocialProtocol.Twitter
+{
+    public class TwitterProfileImageUriTest
+    {
+        [Theory]
+        [InlineData(24, "mini")]
+        [InlineData(25, "normal")]
+        [InlineData(48, "normal")]
+        [InlineData(49, "bigger")]
+        [InlineData(73, "bigger")]
+        [InlineData(74, "original")]
+        public void SizeName_GetPreferredSize_Test(int sizePx, string expected)
+        {
+            var size = TwitterProfileImageUri.SizeName.GetPreferredSize(sizePx);
+            Assert.Equal(expected, size.Name);
+        }
+
+        [Fact]
+        public void SizeName_GetLargerOrSameSize_Test()
+        {
+            var expected = new[]
+            {
+                TwitterProfileImageUri.SizeName.Normal,
+                TwitterProfileImageUri.SizeName.Bigger,
+                TwitterProfileImageUri.SizeName.Original,
+            };
+            Assert.Equal(expected, TwitterProfileImageUri.SizeName.GetLargerOrSameSize(minSizePx: 48));
+        }
+
+        [Theory]
+        [InlineData("https://pbs.twimg.com/profile_images/00000/foo_normal.jpg", 48, "https://pbs.twimg.com/profile_images/00000/foo_normal.jpg")]
+        [InlineData("https://pbs.twimg.com/profile_images/00000/foo_normal.jpg", 73, "https://pbs.twimg.com/profile_images/00000/foo_bigger.jpg")]
+        [InlineData("https://pbs.twimg.com/profile_images/00000/foo_normal.jpg", 24, "https://pbs.twimg.com/profile_images/00000/foo_mini.jpg")]
+        [InlineData("https://pbs.twimg.com/profile_images/00000/foo_normal.jpg", 100, "https://pbs.twimg.com/profile_images/00000/foo.jpg")]
+        [InlineData("https://pbs.twimg.com/profile_images/00000/foo_normal_bar_normal.jpg", 100, "https://pbs.twimg.com/profile_images/00000/foo_normal_bar.jpg")]
+        public void GetImageUri_Test(string normalUrl, int sizePx, string expected)
+        {
+            var responsiveImageUri = new TwitterProfileImageUri(normalUrl);
+            Assert.Equal(expected, responsiveImageUri.GetImageUri(sizePx).AbsoluteUri);
+        }
+
+        [Fact]
+        public void GetImageUriLargerOrSameSize_Test()
+        {
+            var responsiveImageUri = new TwitterProfileImageUri("https://pbs.twimg.com/profile_images/00000/foo_normal.jpg");
+            var expected = new Uri[]
+            {
+                new("https://pbs.twimg.com/profile_images/00000/foo_normal.jpg"),
+                new("https://pbs.twimg.com/profile_images/00000/foo_bigger.jpg"),
+                new("https://pbs.twimg.com/profile_images/00000/foo.jpg"),
+            };
+            Assert.Equal(expected, responsiveImageUri.GetImageUriLargerOrSameSize(minSizePx: 48));
+        }
+
+        [Fact]
+        public void GetOriginalImageUri_Test()
+        {
+            var responsiveImageUri = new TwitterProfileImageUri("https://pbs.twimg.com/profile_images/00000/foo_normal.jpg");
+            Assert.Equal(new("https://pbs.twimg.com/profile_images/00000/foo.jpg"), responsiveImageUri.GetOriginalImageUri());
+        }
+
+        [Fact]
+        public void GetFileName_Test()
+        {
+            var responsiveImageUri = new TwitterProfileImageUri("https://pbs.twimg.com/profile_images/00000/foo_normal.jpg");
+            Assert.Equal("foo.jpg", responsiveImageUri.GetFilename());
+        }
+    }
+}
diff --git a/OpenTween/Models/IResponsiveImageUri.cs b/OpenTween/Models/IResponsiveImageUri.cs
new file mode 100644
index 000000000..d7116da77
--- /dev/null
+++ b/OpenTween/Models/IResponsiveImageUri.cs
@@ -0,0 +1,38 @@
+// OpenTween - Client of Twitter
+// Copyright (c) 2024 kim_upsilon (@kim_upsilon) <https://upsilo.net/~upsilon/>
+// All rights reserved.
+//
+// This file is part of OpenTween.
+//
+// This program is free software; you can redistribute it and/or modify it
+// under the terms of the GNU General Public License as published by the Free
+// Software Foundation; either version 3 of the License, or (at your option)
+// any later version.
+//
+// This program is distributed in the hope that it will be useful, but
+// WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+// or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+// for more details.
+//
+// You should have received a copy of the GNU General Public License along
+// with this program. If not, see <http://www.gnu.org/licenses/>, or write to
+// the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
+// Boston, MA 02110-1301, USA.
+
+#nullable enable
+
+using System;
+
+namespace OpenTween.Models
+{
+    public interface IResponsiveImageUri
+    {
+        public Uri GetImageUri(int sizePx);
+
+        public Uri[] GetImageUriLargerOrSameSize(int minSizePx);
+
+        public Uri GetOriginalImageUri();
+
+        public string GetFilename();
+    }
+}
diff --git a/OpenTween/SocialProtocol/Twitter/TwitterProfileImageUri.cs b/OpenTween/SocialProtocol/Twitter/TwitterProfileImageUri.cs
new file mode 100644
index 000000000..8ec1035fe
--- /dev/null
+++ b/OpenTween/SocialProtocol/Twitter/TwitterProfileImageUri.cs
@@ -0,0 +1,101 @@
+// OpenTween - Client of Twitter
+// Copyright (c) 2024 kim_upsilon (@kim_upsilon) <https://upsilo.net/~upsilon/>
+// All rights reserved.
+//
+// This file is part of OpenTween.
+//
+// This program is free software; you can redistribute it and/or modify it
+// under the terms of the GNU General Public License as published by the Free
+// Software Foundation; either version 3 of the License, or (at your option)
+// any later version.
+//
+// This program is distributed in the hope that it will be useful, but
+// WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+// or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+// for more details.
+//
+// You should have received a copy of the GNU General Public License along
+// with this program. If not, see <http://www.gnu.org/licenses/>, or write to
+// the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
+// Boston, MA 02110-1301, USA.
+
+#nullable enable
+
+using System;
+using System.IO;
+using System.Linq;
+using OpenTween.Models;
+
+namespace OpenTween.SocialProtocol.Twitter
+{
+    public record TwitterProfileImageUri(
+        string NormalImageUrlStr
+    ) : IResponsiveImageUri
+    {
+        public record SizeName
+        {
+            public string Name { get; init; }
+
+            private SizeName(string name)
+                => this.Name = name;
+
+            public static readonly SizeName Mini = new("mini");
+
+            public static readonly SizeName Normal = new("normal");
+
+            public static readonly SizeName Bigger = new("bigger");
+
+            public static readonly SizeName Original = new("original");
+
+            private static readonly (SizeName Size, int MaxSizePx)[] SizeNames = new[]
+            {
+                (Mini, 24),
+                (Normal, 48),
+                (Bigger, 73),
+                (Original, int.MaxValue),
+            };
+
+            public static SizeName GetPreferredSize(int sizePx)
+                => SizeNames.Where(x => sizePx <= x.MaxSizePx).First().Size;
+
+            public static SizeName[] GetLargerOrSameSize(int minSizePx)
+                => SizeNames.Where(x => minSizePx <= x.MaxSizePx).Select(x => x.Size).ToArray();
+        }
+
+        public Uri GetImageUri(int sizePx)
+        {
+            var sizeName = SizeName.GetPreferredSize(sizePx);
+
+            return this.GetImageUri(sizeName);
+        }
+
+        public Uri GetImageUri(SizeName size)
+        {
+            var normalUrlStr = this.NormalImageUrlStr;
+
+            // see: https://developer.twitter.com/en/docs/twitter-api/v1/accounts-and-users/user-profile-images-and-banners
+            string imageUrlStr;
+            if (size == SizeName.Normal)
+                imageUrlStr = normalUrlStr;
+            else if (size == SizeName.Original)
+                imageUrlStr = normalUrlStr.Replace("_normal.", ".");
+            else
+                imageUrlStr = normalUrlStr.Replace("_normal.", $"_{size.Name}.");
+
+            return new(imageUrlStr);
+        }
+
+        public Uri[] GetImageUriLargerOrSameSize(int minSizePx)
+        {
+            var sizes = SizeName.GetLargerOrSameSize(minSizePx);
+
+            return sizes.Select(x => this.GetImageUri(x)).ToArray();
+        }
+
+        public Uri GetOriginalImageUri()
+            => this.GetImageUri(SizeName.Original);
+
+        public string GetFilename()
+            => Path.GetFileName(this.GetOriginalImageUri().AbsolutePath);
+    }
+}