diff --git a/docx-core/examples/size.rs b/docx-core/examples/size.rs
new file mode 100644
index 0000000..6a36a0b
--- /dev/null
+++ b/docx-core/examples/size.rs
@@ -0,0 +1,15 @@
+use docx_core::*;
+
+pub fn main() {
+  let path = std::path::Path::new("./output/size.docx");
+  let file = std::fs::File::create(&path).unwrap();
+  Docx::new()
+    .add_paragraph(Paragraph::new().add_run(Run::new("Hello")).size(60))
+    .add_paragraph(
+      Paragraph::new()
+        .add_run(Run::new(" Wor").size(50))
+        .add_run(Run::new("ld")),
+    )
+    .build()
+    .pack(file);
+}
diff --git a/docx-core/src/documents/elements/mod.rs b/docx-core/src/documents/elements/mod.rs
index 6e153e7..70fab11 100644
--- a/docx-core/src/documents/elements/mod.rs
+++ b/docx-core/src/documents/elements/mod.rs
@@ -13,6 +13,7 @@ mod run_property;
 mod run_property_default;
 mod style;
 mod sz;
+mod sz_cs;
 mod text;
 
 pub use based_on::*;
@@ -30,4 +31,5 @@ pub use run_property::*;
 pub use run_property_default::*;
 pub use style::*;
 pub use sz::*;
+pub use sz_cs::*;
 pub use text::*;
diff --git a/docx-core/src/documents/elements/paragraph.rs b/docx-core/src/documents/elements/paragraph.rs
index 895c4cc..771cba1 100644
--- a/docx-core/src/documents/elements/paragraph.rs
+++ b/docx-core/src/documents/elements/paragraph.rs
@@ -1,4 +1,4 @@
-use super::{ParagraphProperty, ParagraphStyle, Run};
+use super::{ParagraphProperty, Run};
 use crate::documents::BuildXML;
 use crate::types::*;
 use crate::xml_builder::*;
@@ -7,16 +7,13 @@ use crate::xml_builder::*;
 pub struct Paragraph {
     runs: Vec<Run>,
     property: ParagraphProperty,
-    style: ParagraphStyle,
 }
 
 impl Default for Paragraph {
     fn default() -> Self {
-        let s: Option<&str> = None;
         Self {
             runs: Vec::new(),
             property: ParagraphProperty::new(),
-            style: ParagraphStyle::new(s),
         }
     }
 }
@@ -35,6 +32,16 @@ impl Paragraph {
         self.property = self.property.align(alignment_type);
         self
     }
+
+    pub fn size(mut self, size: usize) -> Paragraph {
+        self.runs = self.runs.into_iter().map(|r| r.size(size)).collect();
+        self
+    }
+
+    pub fn style(mut self, style_id: &str) -> Paragraph {
+        self.property = self.property.style(style_id);
+        self
+    }
 }
 
 impl BuildXML for Paragraph {
@@ -42,7 +49,6 @@ impl BuildXML for Paragraph {
         XMLBuilder::new()
             .open_paragraph()
             .add_child(&self.property)
-            .add_child(&self.style)
             .add_children(&self.runs)
             .close()
             .build()
@@ -65,4 +71,13 @@ mod tests {
             r#"<w:p><w:pPr /><w:pStyle w:val="Normal" /><w:r><w:rPr /><w:t xml:space="preserve">Hello</w:t></w:r></w:p>"#
         );
     }
+
+    #[test]
+    fn test_paragraph_size() {
+        let b = Paragraph::new().add_run(Run::new("Hello")).size(60).build();
+        assert_eq!(
+            str::from_utf8(&b).unwrap(),
+            r#"<w:p><w:pPr /><w:r><w:rPr><w:sz w:val="60" /><w:szCs w:val="60" /></w:rPr><w:t xml:space="preserve">Hello</w:t></w:r></w:p>"#
+        );
+    }
 }
diff --git a/docx-core/src/documents/elements/paragraph_property.rs b/docx-core/src/documents/elements/paragraph_property.rs
index cc716c7..e7210b1 100644
--- a/docx-core/src/documents/elements/paragraph_property.rs
+++ b/docx-core/src/documents/elements/paragraph_property.rs
@@ -1,4 +1,4 @@
-use super::{Justification, RunProperty};
+use super::{Justification, ParagraphStyle, RunProperty, Sz, SzCs};
 use crate::documents::BuildXML;
 use crate::types::AlignmentType;
 use crate::xml_builder::*;
@@ -7,13 +7,16 @@ use crate::xml_builder::*;
 pub struct ParagraphProperty {
     alignment: Option<Justification>,
     run_property: RunProperty,
+    style: ParagraphStyle,
 }
 
 impl Default for ParagraphProperty {
     fn default() -> Self {
+        let s: Option<&str> = None;
         ParagraphProperty {
             alignment: None,
             run_property: RunProperty::new(),
+            style: ParagraphStyle::new(s),
         }
     }
 }
@@ -32,15 +35,20 @@ impl ParagraphProperty {
         self.alignment = Some(Justification::new(alignment_type.to_string()));
         self
     }
+
+    pub fn style(mut self, style_id: &str) -> ParagraphProperty {
+        self.style = ParagraphStyle::new(Some(style_id));
+        self
+    }
 }
 
 impl BuildXML for ParagraphProperty {
     fn build(&self) -> Vec<u8> {
-        let b = XMLBuilder::new();
-        let p = b
+        XMLBuilder::new()
             .open_paragraph_property()
-            .add_optional_child(&self.alignment);
-        p.close().build()
+            .add_optional_child(&self.alignment)
+            .close()
+            .build()
     }
 }
 
@@ -53,9 +61,19 @@ mod tests {
     use std::str;
 
     #[test]
-    fn test_build() {
+    fn test_default() {
         let c = ParagraphProperty::new();
         let b = c.build();
         assert_eq!(str::from_utf8(&b).unwrap(), r#"<w:pPr />"#);
     }
+
+    #[test]
+    fn test_alignment() {
+        let c = ParagraphProperty::new();
+        let b = c.align(AlignmentType::Right).build();
+        assert_eq!(
+            str::from_utf8(&b).unwrap(),
+            r#"<w:pPr><w:jc w:val="right" /></w:pPr>"#
+        );
+    }
 }
diff --git a/docx-core/src/documents/elements/run.rs b/docx-core/src/documents/elements/run.rs
index 4ff014a..6c9757f 100644
--- a/docx-core/src/documents/elements/run.rs
+++ b/docx-core/src/documents/elements/run.rs
@@ -15,6 +15,11 @@ impl Run {
             ..Default::default()
         }
     }
+
+    pub fn size(mut self, size: usize) -> Run {
+        self.run_property = self.run_property.size(size);
+        self
+    }
 }
 
 impl Default for Run {
diff --git a/docx-core/src/documents/elements/run_property.rs b/docx-core/src/documents/elements/run_property.rs
index 6fce08d..e73c90a 100644
--- a/docx-core/src/documents/elements/run_property.rs
+++ b/docx-core/src/documents/elements/run_property.rs
@@ -1,10 +1,11 @@
-use super::{Color, Sz};
+use super::{Color, Sz, SzCs};
 use crate::documents::BuildXML;
 use crate::xml_builder::*;
 
 #[derive(Debug)]
 pub struct RunProperty {
     sz: Option<Sz>,
+    sz_cs: Option<SzCs>,
     color: Option<Color>,
 }
 
@@ -13,12 +14,13 @@ impl RunProperty {
         Default::default()
     }
 
-    pub fn add_sz(mut self, sz: usize) -> RunProperty {
-        self.sz = Some(Sz::new(sz));
+    pub fn size(mut self, size: usize) -> RunProperty {
+        self.sz = Some(Sz::new(size));
+        self.sz_cs = Some(SzCs::new(size));
         self
     }
 
-    pub fn add_color(mut self, color: &str) -> RunProperty {
+    pub fn color(mut self, color: &str) -> RunProperty {
         self.color = Some(Color::new(color));
         self
     }
@@ -27,8 +29,9 @@ impl RunProperty {
 impl Default for RunProperty {
     fn default() -> Self {
         Self {
-            sz: None,
             color: None,
+            sz: None,
+            sz_cs: None,
         }
     }
 }
@@ -38,6 +41,7 @@ impl BuildXML for RunProperty {
         let b = XMLBuilder::new();
         b.open_run_property()
             .add_optional_child(&self.sz)
+            .add_optional_child(&self.sz_cs)
             .add_optional_child(&self.color)
             .close()
             .build()
@@ -54,11 +58,11 @@ mod tests {
 
     #[test]
     fn test_build() {
-        let c = RunProperty::new().add_sz(10).add_color("FFFFFF");
+        let c = RunProperty::new().size(10).color("FFFFFF");
         let b = c.build();
         assert_eq!(
             str::from_utf8(&b).unwrap(),
-            r#"<w:rPr><w:sz w:val="10" /><w:color w:val="FFFFFF" /></w:rPr>"#
+            r#"<w:rPr><w:sz w:val="10" /><w:szCs w:val="10" /><w:color w:val="FFFFFF" /></w:rPr>"#
         );
     }
 }
diff --git a/docx-core/src/documents/elements/sz_cs.rs b/docx-core/src/documents/elements/sz_cs.rs
new file mode 100644
index 0000000..15fd6fb
--- /dev/null
+++ b/docx-core/src/documents/elements/sz_cs.rs
@@ -0,0 +1,35 @@
+use crate::documents::BuildXML;
+use crate::xml_builder::*;
+
+#[derive(Debug)]
+pub struct SzCs {
+    val: usize,
+}
+
+impl SzCs {
+    pub fn new(val: usize) -> SzCs {
+        SzCs { val }
+    }
+}
+
+impl BuildXML for SzCs {
+    fn build(&self) -> Vec<u8> {
+        XMLBuilder::new().sz_cs(self.val).build()
+    }
+}
+
+#[cfg(test)]
+mod tests {
+
+    use super::*;
+    #[cfg(test)]
+    use pretty_assertions::assert_eq;
+    use std::str;
+
+    #[test]
+    fn test_sz_cs() {
+        let c = SzCs::new(20);
+        let b = c.build();
+        assert_eq!(str::from_utf8(&b).unwrap(), r#"<w:szCs w:val="20" />"#);
+    }
+}
diff --git a/docx-core/src/xml_builder/elements.rs b/docx-core/src/xml_builder/elements.rs
index 90c7586..14e3493 100644
--- a/docx-core/src/xml_builder/elements.rs
+++ b/docx-core/src/xml_builder/elements.rs
@@ -8,7 +8,6 @@ impl XMLBuilder {
     // i.e. <w:basedOn ... >
     only_str_val_el!(based_on, "w:basedOn");
     // i.e. <w:t ... >
-    // i.e. <w:sz ... >
     pub(crate) fn text(mut self, text: &str, preserve_space: bool) -> Self {
         let space = if preserve_space {
             "preserve"
@@ -38,12 +37,9 @@ impl XMLBuilder {
     // i.e. <w:pStyle ... >
     only_str_val_el!(paragraph_style, "w:pStyle");
     // i.e. <w:sz ... >
-    pub(crate) fn sz(mut self, val: usize) -> Self {
-        self.writer
-            .write(XmlEvent::start_element("w:sz").attr("w:val", &format!("{}", val)))
-            .expect("should write to buf");
-        self.close()
-    }
+    only_usize_val_el!(sz, "w:sz");
+    // i.e. <w:szCs ... >
+    only_usize_val_el!(sz_cs, "w:szCs");
     // Build w:style element
     // i.e. <w:style ... >
     pub(crate) fn open_style(mut self, style_type: StyleType, id: &str) -> Self {
diff --git a/docx-core/src/xml_builder/macros.rs b/docx-core/src/xml_builder/macros.rs
index 61b91a3..ad3981d 100644
--- a/docx-core/src/xml_builder/macros.rs
+++ b/docx-core/src/xml_builder/macros.rs
@@ -142,15 +142,13 @@ macro_rules! only_str_val_el {
     };
 }
 
-/*
 macro_rules! only_usize_val_el {
     ($name: ident, $el_name: expr) => {
         pub(crate) fn $name(mut self, val: usize) -> Self {
             self.writer
-                .write(XmlEvent::start_element($el_name).attr("w:val", val))
+                .write(XmlEvent::start_element($el_name).attr("w:val", &format!("{}", val)))
                 .expect("should write to buf");
             self.close()
         }
     };
 }
-*/