diff --git a/Cargo.lock b/Cargo.lock
index 518257e..7cd75c2 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -518,6 +518,7 @@ dependencies = [
  "clap",
  "clap_derive",
  "dyesub",
+ "svg-units",
 ]
 
 [[package]]
@@ -584,6 +585,20 @@ version = "1.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5443807d6dff69373d433ab9ef5378ad8df50ca6298caf15de6e52e24aaf54d5"
 
+[[package]]
+name = "err-derive"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c34a887c8df3ed90498c1c437ce21f211c8e27672921a8ffa293cb8d6d4caa9e"
+dependencies = [
+ "proc-macro-error",
+ "proc-macro2",
+ "quote",
+ "rustversion",
+ "syn 1.0.109",
+ "synstructure",
+]
+
 [[package]]
 name = "errno"
 version = "0.3.2"
@@ -1963,7 +1978,7 @@ dependencies = [
 name = "svg-units"
 version = "0.1.0"
 dependencies = [
- "derive_more",
+ "err-derive",
  "lazy_static",
  "regex",
  "strum",
@@ -2004,6 +2019,18 @@ dependencies = [
  "syn 2.0.28",
 ]
 
+[[package]]
+name = "synstructure"
+version = "0.12.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f36bdaa60a83aca3921b5259d5400cbf5e90fc51931376a9bd4a0eb79aa7210f"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 1.0.109",
+ "unicode-xid",
+]
+
 [[package]]
 name = "thiserror"
 version = "1.0.47"
diff --git a/Cargo.toml b/Cargo.toml
index 35797e0..083bd5f 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,3 +1,3 @@
 [workspace]
 members = ["dyesub-tool", "dyesub-cli", "dyesub", "svg-units"]
-resolver = "2"
\ No newline at end of file
+resolver = "2"
diff --git a/dyesub-cli/Cargo.toml b/dyesub-cli/Cargo.toml
index c32d273..8c88a67 100644
--- a/dyesub-cli/Cargo.toml
+++ b/dyesub-cli/Cargo.toml
@@ -9,3 +9,4 @@ edition = "2021"
 clap = "4.3.23"
 clap_derive = "4.3.12"
 dyesub = { path = "../dyesub" }
+svg-units = { path = "../svg-units" }
\ No newline at end of file
diff --git a/dyesub-cli/src/main.rs b/dyesub-cli/src/main.rs
index 6e114a8..2128824 100644
--- a/dyesub-cli/src/main.rs
+++ b/dyesub-cli/src/main.rs
@@ -2,7 +2,7 @@ use std::path::PathBuf;
 
 use clap::Parser;
 use clap_derive::Parser;
-use dyesub::Result;
+use svg_units::SVGMeasure;
 
 #[derive(Parser, Debug)]
 #[command(author, version, about, long_about = None)]
@@ -12,15 +12,21 @@ struct Args {
     /// Output SVG path
     #[arg(short, long)]
     output: Option<PathBuf>,
+    /// Page width
+    #[arg(long, default_value="11in")]
+    width: SVGMeasure,
+    /// Page height
+    #[arg(long, default_value="8.5in")]
+    height: SVGMeasure,
 }
 
-fn main() -> Result<()> {
+fn main() -> dyesub::Result<()> {
     let args = Args::parse();
     let output = args.output.unwrap_or_else(|| {
         let mut path = args.input.clone();
         path.set_extension("svg");
         path
     });
-    dyesub::render_file(&args.input, output)?;
+    dyesub::render_file(&args.input, &output)?;
     Ok(())
 }
diff --git a/flake.nix b/flake.nix
index d950ff9..3f929a3 100644
--- a/flake.nix
+++ b/flake.nix
@@ -66,7 +66,7 @@ Updating `cargoHash`:
           pname = "dyesub-cli";
           version = "0.1.0";
           buildAndTestSubdir = "dyesub-cli";
-          cargoHash = "sha256-S4GvLg/B/FxjNyrQyBg25OMTgJVVBwPO+Dy/EFM4WoQ=";
+          cargoHash = "sha256-6nbUjVjroFp2KZEk0wDisCUw2e9GtVxFgsGZm8xEe2A=";
           meta = meta // {
             description = "A tool for generating dye sublimation transfer sheet SVGs for Japanese thumb shift 拇指シフト keycaps.";
           };
diff --git a/svg-units/Cargo.toml b/svg-units/Cargo.toml
index 4189723..7891f26 100644
--- a/svg-units/Cargo.toml
+++ b/svg-units/Cargo.toml
@@ -6,7 +6,7 @@ edition = "2021"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-derive_more = "0.99.17"
+err-derive = "0.3.1"
 lazy_static = "1.4.0"
 regex = "1.9.3"
 strum = "0.25.0"
diff --git a/svg-units/src/lib.rs b/svg-units/src/lib.rs
index d2d5fb1..a911cb2 100644
--- a/svg-units/src/lib.rs
+++ b/svg-units/src/lib.rs
@@ -2,7 +2,7 @@ mod unit;
 pub use unit::SVGUnit;
 
 mod measure;
-pub use measure::SVGMeasure;
+pub use measure::{SVGMeasure, SVGMeasureParseError};
 
 #[cfg(test)]
 mod tests;
diff --git a/svg-units/src/measure.rs b/svg-units/src/measure.rs
index e9c3afa..902af66 100644
--- a/svg-units/src/measure.rs
+++ b/svg-units/src/measure.rs
@@ -1,5 +1,5 @@
 use super::SVGUnit;
-use derive_more::From;
+use err_derive::Error;
 use lazy_static::lazy_static;
 use regex::Regex;
 use std::cmp::Ordering;
@@ -35,15 +35,18 @@ impl SVGMeasure {
     }
 }
 
-#[derive(From, Debug)]
-pub enum SVGUnitParseError {
-    ParseMeasure(ParseFloatError),
-    ParseUnit(ParseError),
+#[derive(Debug, Error)]
+pub enum SVGMeasureParseError {
+    #[error(display = "Failed to parse measure number")]
+    ParseMeasure(#[source] ParseFloatError),
+    #[error(display = "Failed to parse measure unit")]
+    ParseUnit(#[source] ParseError),
+    #[error(display = "Invalid measure format")]
     Invalid,
 }
 
 impl FromStr for SVGMeasure {
-    type Err = SVGUnitParseError;
+    type Err = SVGMeasureParseError;
     fn from_str(s: &str) -> Result<Self, Self::Err> {
         if s == "0" {
             return Ok(SVGMeasure::new(0.0, SVGUnit::Pixel));
@@ -56,11 +59,19 @@ impl FromStr for SVGMeasure {
             let unit = captures[2].parse::<SVGUnit>()?;
             Ok(SVGMeasure::new(measure, unit))
         } else {
-            Err(SVGUnitParseError::Invalid)
+            Err(SVGMeasureParseError::Invalid)
         }
     }
 }
 
+impl<'s> TryFrom<&'s str> for SVGMeasure {
+    type Error = SVGMeasureParseError;
+
+    fn try_from(value: &'s str) -> Result<Self, Self::Error> {
+        Self::from_str(value)
+    }
+}
+
 const EQ_TOLERANCE: f64 = 0.00001;
 
 impl PartialEq for SVGMeasure {