diff --git a/cmd/cmd.go b/cmd/cmd.go
index 34e33fc..bb75291 100644
--- a/cmd/cmd.go
+++ b/cmd/cmd.go
@@ -57,7 +57,7 @@ func run(cmd *cobra.Command, _ []string) error {
 
 	g := game.New(
 		game.WithPattern(pat),
-		game.WithDimensions(400, 400),
+		game.WithDimensions(conf.Width, conf.Height),
 		game.WithPlay(conf.Play),
 	)
 
diff --git a/docs/cli-of-life.md b/docs/cli-of-life.md
index acf2f51..0af357f 100644
--- a/docs/cli-of-life.md
+++ b/docs/cli-of-life.md
@@ -12,8 +12,10 @@ cli-of-life [flags]
       --completion string    Output command-line completion code for the specified shell (one of: bash, zsh, fish, powershell)
   -f, --file string          Loads a pattern file on startup
       --file-format string   File format (one of: auto, rle, plaintext) (default "auto")
+      --height uint          Board height. Will be ignored if a larger pattern is loaded. (default 400)
   -h, --help                 help for cli-of-life
       --play                 Play on startup
       --rule-string string   Rule string to use. This will be ignored if a pattern file is loaded. (default "B3/S23")
+      --width uint           Board width. Will be ignored if a larger pattern is loaded. (default 400)
 ```
 
diff --git a/internal/config/config.go b/internal/config/config.go
index e301edf..95f14a1 100644
--- a/internal/config/config.go
+++ b/internal/config/config.go
@@ -7,6 +7,8 @@ type Config struct {
 	FileFormat string
 	RuleString string
 	Play       bool
+	Width      uint
+	Height     uint
 
 	Completion string
 }
@@ -15,5 +17,7 @@ func New() *Config {
 	return &Config{
 		FileFormat: "auto",
 		RuleString: pattern.GameOfLife().String(),
+		Width:      400,
+		Height:     400,
 	}
 }
diff --git a/internal/config/flags.go b/internal/config/flags.go
index 23990da..7bcc47c 100644
--- a/internal/config/flags.go
+++ b/internal/config/flags.go
@@ -12,6 +12,8 @@ const (
 	FileFormatFlag = "file-format"
 	RuleStringFlag = "rule-string"
 	PlayFlag       = "play"
+	WidthFlag      = "width"
+	HeightFlag     = "height"
 	CompletionFlag = "completion"
 )
 
@@ -20,5 +22,7 @@ func (c *Config) RegisterFlags(fs *pflag.FlagSet) {
 	fs.StringVar(&c.FileFormat, FileFormatFlag, c.FileFormat, "File format (one of: "+strings.Join(pattern.FormatStrings(), ", ")+")")
 	fs.StringVar(&c.RuleString, RuleStringFlag, c.RuleString, "Rule string to use. This will be ignored if a pattern file is loaded.")
 	fs.BoolVar(&c.Play, PlayFlag, c.Play, "Play on startup")
+	fs.UintVar(&c.Width, WidthFlag, c.Width, "Board width. Will be ignored if a larger pattern is loaded.")
+	fs.UintVar(&c.Height, HeightFlag, c.Height, "Board height. Will be ignored if a larger pattern is loaded.")
 	fs.StringVar(&c.Completion, CompletionFlag, c.Completion, "Output command-line completion code for the specified shell (one of: "+strings.Join(shells(), ", ")+")")
 }
diff --git a/internal/game/opts.go b/internal/game/opts.go
index 08fbf8d..f5f3700 100644
--- a/internal/game/opts.go
+++ b/internal/game/opts.go
@@ -15,10 +15,10 @@ func WithPattern(pat pattern.Pattern) Option {
 	}
 }
 
-func WithDimensions(width, height int) Option {
+func WithDimensions(width, height uint) Option {
 	return func(game *Game) {
-		newW := max(width, game.BoardW()+100)
-		newH := max(height, game.BoardH()+100)
+		newW := max(int(width), game.BoardW()+100)
+		newH := max(int(height), game.BoardH()+100)
 		game.Resize(newW, newH, image.Pt(0, 0))
 	}
 }