diff --git a/textarea/textarea.go b/textarea/textarea.go
index 1d3aa97b..4d59b741 100644
--- a/textarea/textarea.go
+++ b/textarea/textarea.go
@@ -862,32 +862,41 @@ func (m *Model) moveToEnd() {
 // It is important that the width of the textarea be exactly the given width
 // and no more.
 func (m *Model) SetWidth(w int) {
+	// Input width must be at least minimum width.
+	inputWidth := max(w, minWidth)
+
+	// Input width must be no more than maximum width.
 	if m.MaxWidth > 0 {
-		m.viewport.Width = clamp(w, minWidth, m.MaxWidth)
-	} else {
-		m.viewport.Width = max(w, minWidth)
+		inputWidth = min(inputWidth, m.MaxWidth)
 	}
 
-	// Since the width of the textarea input is dependent on the width of the
-	// prompt and line numbers, we need to calculate it by subtracting.
-	inputWidth := w
-	if m.ShowLineNumbers {
-		inputWidth -= uniseg.StringWidth(fmt.Sprintf(m.lineNumberFormat, 0))
-	}
+	// Since the width of the viewport and input area is dependent on the width of
+	// borders, prompt and line numbers, we need to calculate it by subtracting
+	// them from the desired width.
 
-	// Account for base style borders and padding.
+	// Subtract base style borders and padding. We need to handle this before we
+	// can set the viewport size.
 	inputWidth -= m.style.Base.GetHorizontalFrameSize()
 
+	// Viewport width can now be set because we known the visible width.
+	m.viewport.Width = inputWidth
+
+	// Subtract line number width from input width.
+	if m.ShowLineNumbers {
+		const lnWidth = 4 // Up to 3 digits for line number plus 1 margin.
+		inputWidth -= lnWidth
+	}
+
+	// Update prompt width only if there is no prompt function as SetPromptFunc
+	// updates the prompt width when it is called.
 	if m.promptFunc == nil {
 		m.promptWidth = uniseg.StringWidth(m.Prompt)
 	}
 
+	// Subtract prompt width from input width.
 	inputWidth -= m.promptWidth
-	if m.MaxWidth > 0 {
-		m.width = clamp(inputWidth, minWidth, m.MaxWidth)
-	} else {
-		m.width = max(inputWidth, minWidth)
-	}
+
+	m.width = inputWidth
 }
 
 // SetPromptFunc supersedes the Prompt field and sets a dynamic prompt
diff --git a/textarea/textarea_test.go b/textarea/textarea_test.go
index e02ecf8f..8f06ff57 100644
--- a/textarea/textarea_test.go
+++ b/textarea/textarea_test.go
@@ -8,6 +8,7 @@ import (
 	"github.com/MakeNowJust/heredoc"
 	"github.com/acarl005/stripansi"
 	tea "github.com/charmbracelet/bubbletea"
+	"github.com/charmbracelet/lipgloss"
 )
 
 func TestVerticalScrolling(t *testing.T) {
@@ -672,6 +673,470 @@ func TestView(t *testing.T) {
 				cursorCol: 7,
 			},
 		},
+		{
+			name: "set width",
+			modelFunc: func(m Model) Model {
+				m.SetWidth(10)
+
+				input := "12"
+				m = sendString(m, input)
+
+				return m
+			},
+			want: want{
+				view: heredoc.Doc(`
+					>   1 12
+					> ~
+					> ~
+					> ~
+					> ~
+					> ~
+				`),
+				cursorRow: 0,
+				cursorCol: 2,
+			},
+		},
+		{
+			name: "set width max length text minus one",
+			modelFunc: func(m Model) Model {
+				m.SetWidth(10)
+
+				input := "123"
+				m = sendString(m, input)
+
+				return m
+			},
+			want: want{
+				view: heredoc.Doc(`
+					>   1 123
+					> ~
+					> ~
+					> ~
+					> ~
+					> ~
+				`),
+				cursorRow: 0,
+				cursorCol: 3,
+			},
+		},
+		{
+			name: "set width max length text",
+			modelFunc: func(m Model) Model {
+				m.SetWidth(10)
+
+				input := "1234"
+				m = sendString(m, input)
+
+				return m
+			},
+			want: want{
+				view: heredoc.Doc(`
+					>   1 1234
+					>
+					> ~
+					> ~
+					> ~
+					> ~
+				`),
+				cursorRow: 1,
+				cursorCol: 0,
+			},
+		},
+		{
+			name: "set width max length text plus one",
+			modelFunc: func(m Model) Model {
+				m.SetWidth(10)
+
+				input := "12345"
+				m = sendString(m, input)
+
+				return m
+			},
+			want: want{
+				view: heredoc.Doc(`
+					>   1 1234
+					>     5
+					> ~
+					> ~
+					> ~
+					> ~
+				`),
+				cursorRow: 1,
+				cursorCol: 1,
+			},
+		},
+		{
+			name: "set width set max width minus one",
+			modelFunc: func(m Model) Model {
+				m.MaxWidth = 10
+				m.SetWidth(11)
+
+				input := "123"
+				m = sendString(m, input)
+
+				return m
+			},
+			want: want{
+				view: heredoc.Doc(`
+					>   1 123
+					> ~
+					> ~
+					> ~
+					> ~
+					> ~
+				`),
+				cursorRow: 0,
+				cursorCol: 3,
+			},
+		},
+		{
+			name: "set width set max width",
+			modelFunc: func(m Model) Model {
+				m.MaxWidth = 10
+				m.SetWidth(11)
+
+				input := "1234"
+				m = sendString(m, input)
+
+				return m
+			},
+			want: want{
+				view: heredoc.Doc(`
+					>   1 1234
+					>
+					> ~
+					> ~
+					> ~
+					> ~
+				`),
+				cursorRow: 1,
+				cursorCol: 0,
+			},
+		},
+		{
+			name: "set width set max width plus one",
+			modelFunc: func(m Model) Model {
+				m.MaxWidth = 10
+				m.SetWidth(11)
+
+				input := "12345"
+				m = sendString(m, input)
+
+				return m
+			},
+			want: want{
+				view: heredoc.Doc(`
+					>   1 1234
+					>     5
+					> ~
+					> ~
+					> ~
+					> ~
+				`),
+				cursorRow: 1,
+				cursorCol: 1,
+			},
+		},
+		{
+			name: "set width without line numbers max length text minus one",
+			modelFunc: func(m Model) Model {
+				m.ShowLineNumbers = false
+				m.SetWidth(6)
+
+				input := "123"
+				m = sendString(m, input)
+
+				return m
+			},
+			want: want{
+				view: heredoc.Doc(`
+					> 123
+					> ~
+					> ~
+					> ~
+					> ~
+					> ~
+				`),
+				cursorRow: 0,
+				cursorCol: 3,
+			},
+		},
+		{
+			name: "set width without line numbers max length text",
+			modelFunc: func(m Model) Model {
+				m.ShowLineNumbers = false
+				m.SetWidth(6)
+
+				input := "1234"
+				m = sendString(m, input)
+
+				return m
+			},
+			want: want{
+				view: heredoc.Doc(`
+					> 1234
+					>
+					> ~
+					> ~
+					> ~
+					> ~
+				`),
+				cursorRow: 1,
+				cursorCol: 0,
+			},
+		},
+		{
+			name: "set width without line numbers max length text plus one",
+			modelFunc: func(m Model) Model {
+				m.ShowLineNumbers = false
+				m.SetWidth(6)
+
+				input := "12345"
+				m = sendString(m, input)
+
+				return m
+			},
+			want: want{
+				view: heredoc.Doc(`
+					> 1234
+					> 5
+					> ~
+					> ~
+					> ~
+					> ~
+				`),
+				cursorRow: 1,
+				cursorCol: 1,
+			},
+		},
+		{
+			name: "set width with style",
+			modelFunc: func(m Model) Model {
+				m.FocusedStyle.Base = lipgloss.NewStyle().Border(lipgloss.NormalBorder())
+				m.Focus()
+
+				m.SetWidth(12)
+
+				input := "1"
+				m = sendString(m, input)
+
+				return m
+			},
+			want: want{
+				view: heredoc.Doc(`
+					┌──────────┐
+					│>   1 1   │
+					│> ~       │
+					│> ~       │
+					│> ~       │
+					│> ~       │
+					│> ~       │
+					└──────────┘
+				`),
+				cursorRow: 0,
+				cursorCol: 1,
+			},
+		},
+		{
+			name: "set width with style max width minus one",
+			modelFunc: func(m Model) Model {
+				m.FocusedStyle.Base = lipgloss.NewStyle().Border(lipgloss.NormalBorder())
+				m.Focus()
+
+				m.SetWidth(12)
+
+				input := "123"
+				m = sendString(m, input)
+
+				return m
+			},
+			want: want{
+				view: heredoc.Doc(`
+					┌──────────┐
+					│>   1 123 │
+					│> ~       │
+					│> ~       │
+					│> ~       │
+					│> ~       │
+					│> ~       │
+					└──────────┘
+				`),
+				cursorRow: 0,
+				cursorCol: 3,
+			},
+		},
+		{
+			name: "set width with style max width",
+			modelFunc: func(m Model) Model {
+				m.FocusedStyle.Base = lipgloss.NewStyle().Border(lipgloss.NormalBorder())
+				m.Focus()
+
+				m.SetWidth(12)
+
+				input := "1234"
+				m = sendString(m, input)
+
+				return m
+			},
+			want: want{
+				view: heredoc.Doc(`
+					┌──────────┐
+					│>   1 1234│
+					│>         │
+					│> ~       │
+					│> ~       │
+					│> ~       │
+					│> ~       │
+					└──────────┘
+				`),
+				cursorRow: 1,
+				cursorCol: 0,
+			},
+		},
+		{
+			name: "set width with style max width plus one",
+			modelFunc: func(m Model) Model {
+				m.FocusedStyle.Base = lipgloss.NewStyle().Border(lipgloss.NormalBorder())
+				m.Focus()
+
+				m.SetWidth(12)
+
+				input := "12345"
+				m = sendString(m, input)
+
+				return m
+			},
+			want: want{
+				view: heredoc.Doc(`
+					┌──────────┐
+					│>   1 1234│
+					│>     5   │
+					│> ~       │
+					│> ~       │
+					│> ~       │
+					│> ~       │
+					└──────────┘
+				`),
+				cursorRow: 1,
+				cursorCol: 1,
+			},
+		},
+		{
+			name: "set width without line numbers with style",
+			modelFunc: func(m Model) Model {
+				m.FocusedStyle.Base = lipgloss.NewStyle().Border(lipgloss.NormalBorder())
+				m.Focus()
+
+				m.ShowLineNumbers = false
+				m.SetWidth(12)
+
+				input := "123456"
+				m = sendString(m, input)
+
+				return m
+			},
+			want: want{
+				view: heredoc.Doc(`
+					┌──────────┐
+					│> 123456  │
+					│> ~       │
+					│> ~       │
+					│> ~       │
+					│> ~       │
+					│> ~       │
+					└──────────┘
+				`),
+				cursorRow: 0,
+				cursorCol: 6,
+			},
+		},
+		{
+			name: "set width without line numbers with style max width minus one",
+			modelFunc: func(m Model) Model {
+				m.FocusedStyle.Base = lipgloss.NewStyle().Border(lipgloss.NormalBorder())
+				m.Focus()
+
+				m.ShowLineNumbers = false
+				m.SetWidth(12)
+
+				input := "1234567"
+				m = sendString(m, input)
+
+				return m
+			},
+			want: want{
+				view: heredoc.Doc(`
+					┌──────────┐
+					│> 1234567 │
+					│> ~       │
+					│> ~       │
+					│> ~       │
+					│> ~       │
+					│> ~       │
+					└──────────┘
+				`),
+				cursorRow: 0,
+				cursorCol: 7,
+			},
+		},
+		{
+			name: "set width without line numbers with style max width",
+			modelFunc: func(m Model) Model {
+				m.FocusedStyle.Base = lipgloss.NewStyle().Border(lipgloss.NormalBorder())
+				m.Focus()
+
+				m.ShowLineNumbers = false
+				m.SetWidth(12)
+
+				input := "12345678"
+				m = sendString(m, input)
+
+				return m
+			},
+			want: want{
+				view: heredoc.Doc(`
+					┌──────────┐
+					│> 12345678│
+					│>         │
+					│> ~       │
+					│> ~       │
+					│> ~       │
+					│> ~       │
+					└──────────┘
+				`),
+				cursorRow: 1,
+				cursorCol: 0,
+			},
+		},
+		{
+			name: "set width without line numbers with style max width plus one",
+			modelFunc: func(m Model) Model {
+				m.FocusedStyle.Base = lipgloss.NewStyle().Border(lipgloss.NormalBorder())
+				m.Focus()
+
+				m.ShowLineNumbers = false
+				m.SetWidth(12)
+
+				input := "123456789"
+				m = sendString(m, input)
+
+				return m
+			},
+			want: want{
+				view: heredoc.Doc(`
+					┌──────────┐
+					│> 12345678│
+					│> 9       │
+					│> ~       │
+					│> ~       │
+					│> ~       │
+					│> ~       │
+					└──────────┘
+				`),
+				cursorRow: 1,
+				cursorCol: 1,
+			},
+		},
 	}
 
 	for _, tt := range tests {