diff --git a/src/config.rs b/src/config.rs
index 4dd1213..123f5d1 100644
--- a/src/config.rs
+++ b/src/config.rs
@@ -13,11 +13,11 @@ use super::tab::HeadingOptions;
 pub const CONFIG_VERSION: u64 = 1;
 
 // Default icon sizes
-const ICON_SIZE_LIST: u16 = 24;
-const ICON_SIZE_LIST_CONDENSED: u16 = 48;
-const ICON_SIZE_GRID: u16 = 64;
+pub const ICON_SIZE_LIST: u16 = 24;
+pub const ICON_SIZE_LIST_CONDENSED: u16 = 48;
+pub const ICON_SIZE_GRID: u16 = 64;
 // TODO: 5 is an arbitrary number. Maybe there's a better icon size max
-const ICON_SCALE_MAX: u16 = 5;
+pub const ICON_SCALE_MAX: u16 = 5;
 
 #[derive(Clone, Copy, Debug, Deserialize, Eq, PartialEq, Serialize)]
 pub enum AppTheme {
diff --git a/src/tab.rs b/src/tab.rs
index 46db08a..ea8c69b 100644
--- a/src/tab.rs
+++ b/src/tab.rs
@@ -36,7 +36,7 @@ use std::{
 
 use crate::{
     app::{self, Action},
-    config::{IconSizes, TabConfig},
+    config::{IconSizes, TabConfig, ICON_SCALE_MAX, ICON_SIZE_GRID},
     dialog::DialogKind,
     fl, menu,
     mime_app::{mime_apps, MimeApp},
@@ -1923,7 +1923,10 @@ impl Tab {
                                     Ok(reader) => match reader.decode() {
                                         Ok(image) => {
                                             //TODO: configurable thumbnail size?
-                                            let thumbnail = image.thumbnail(64, 64);
+                                            let thumbnail_size =
+                                                (ICON_SIZE_GRID * ICON_SCALE_MAX) as u32;
+                                            let thumbnail =
+                                                image.thumbnail(thumbnail_size, thumbnail_size);
                                             ItemThumbnail::Rgba(thumbnail.to_rgba8())
                                         }
                                         Err(err) => {