diff --git a/docs/changelog.md b/docs/changelog.md
index 52150ca39..37a4ffa32 100644
--- a/docs/changelog.md
+++ b/docs/changelog.md
@@ -10,6 +10,9 @@ Requires libvips v8.16.0
 
 * Expose WebP `smartDeblock` output option.
 
+* Support `info.size` on wide-character systems via upgrade to C++17.
+  [#3943](https://github.com/lovell/sharp/issues/3943)
+
 * Ensure `background` metadata can be parsed by `color` package.
   [#4090](https://github.com/lovell/sharp/issues/4090)
 
diff --git a/docs/install.md b/docs/install.md
index 8a897589f..8d16fe1d9 100644
--- a/docs/install.md
+++ b/docs/install.md
@@ -38,7 +38,7 @@ Ready-compiled sharp and libvips binaries are provided for use on the most commo
 
 * macOS x64 (>= 10.15)
 * macOS ARM64
-* Linux ARM (glibc >= 2.28)
+* Linux ARM (glibc >= 2.31)
 * Linux ARM64 (glibc >= 2.26, musl >= 1.2.2)
 * Linux ppc64 (glibc >= 2.31)
 * Linux s390x (glibc >= 2.31)
@@ -111,7 +111,7 @@ environment variables.
 
 Building from source requires:
 
-* C++11 compiler
+* C++17 compiler
 * [node-addon-api](https://www.npmjs.com/package/node-addon-api) version 7+
 * [node-gyp](https://github.com/nodejs/node-gyp#installation) version 9+ and its dependencies
 
diff --git a/npm/linux-arm/package.json b/npm/linux-arm/package.json
index 31ab2b75b..91b322dd8 100644
--- a/npm/linux-arm/package.json
+++ b/npm/linux-arm/package.json
@@ -15,7 +15,7 @@
   },
   "preferUnplugged": true,
   "optionalDependencies": {
-    "@img/sharp-libvips-linux-arm": "1.1.0-rc3"
+    "@img/sharp-libvips-linux-arm": "1.1.0-rc3.1"
   },
   "files": [
     "lib"
@@ -32,7 +32,7 @@
     "node": "^18.17.0 || ^20.3.0 || >=21.0.0"
   },
   "config": {
-    "glibc": ">=2.28"
+    "glibc": ">=2.31"
   },
   "os": [
     "linux"
diff --git a/package.json b/package.json
index a41d2ff67..bcf1f8c0d 100644
--- a/package.json
+++ b/package.json
@@ -146,7 +146,7 @@
     "@img/sharp-darwin-x64": "0.33.5",
     "@img/sharp-libvips-darwin-arm64": "1.1.0-rc3",
     "@img/sharp-libvips-darwin-x64": "1.1.0-rc3",
-    "@img/sharp-libvips-linux-arm": "1.1.0-rc3",
+    "@img/sharp-libvips-linux-arm": "1.1.0-rc3.1",
     "@img/sharp-libvips-linux-arm64": "1.1.0-rc3",
     "@img/sharp-libvips-linux-ppc64": "1.1.0-rc3",
     "@img/sharp-libvips-linux-s390x": "1.1.0-rc3",
@@ -178,7 +178,7 @@
     "jsdoc-to-markdown": "^9.0.5",
     "license-checker": "^25.0.1",
     "mocha": "^10.8.2",
-    "node-addon-api": "8.1.0",
+    "node-addon-api": "^8.2.1",
     "nyc": "^17.1.0",
     "prebuild": "^13.0.1",
     "semistandard": "^17.0.0",
diff --git a/src/binding.gyp b/src/binding.gyp
index 5049d8cad..8292b64b9 100644
--- a/src/binding.gyp
+++ b/src/binding.gyp
@@ -45,6 +45,9 @@
           'Release': {
             'msvs_settings': {
               'VCCLCompilerTool': {
+                "AdditionalOptions": [
+                  "/std:c++17"
+                ],
                 'ExceptionHandling': 1,
                 'Optimization': 1,
                 'WholeProgramOptimization': 'true'
@@ -172,6 +175,7 @@
                 '-l:libvips-cpp.so.<(vips_version)'
               ],
               'ldflags': [
+                '-lstdc++fs',
                 '-Wl,-s',
                 '-Wl,--disable-new-dtags',
                 '-Wl,-z,nodelete',
@@ -207,13 +211,13 @@
       }]
     ],
     'cflags_cc': [
-      '-std=c++0x',
+      '-std=c++17',
       '-fexceptions',
       '-Wall',
       '-Os'
     ],
     'xcode_settings': {
-      'CLANG_CXX_LANGUAGE_STANDARD': 'c++11',
+      'CLANG_CXX_LANGUAGE_STANDARD': 'c++17',
       'MACOSX_DEPLOYMENT_TARGET': '10.15',
       'GCC_ENABLE_CPP_EXCEPTIONS': 'YES',
       'GCC_ENABLE_CPP_RTTI': 'YES',
@@ -234,6 +238,9 @@
           ['OS == "win"', {
             'msvs_settings': {
               'VCCLCompilerTool': {
+                "AdditionalOptions": [
+                  "/std:c++17"
+                ],
                 'ExceptionHandling': 1,
                 'Optimization': 1,
                 'WholeProgramOptimization': 'true'
diff --git a/src/common.h b/src/common.h
index f079de1e0..67d864115 100644
--- a/src/common.h
+++ b/src/common.h
@@ -20,13 +20,9 @@
 #error "libvips version 8.16.0+ is required - please see https://sharp.pixelplumbing.com/install"
 #endif
 
-#if ((!defined(__clang__)) && defined(__GNUC__) && (__GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ < 6)))
-#error "GCC version 4.6+ is required for C++11 features - please see https://sharp.pixelplumbing.com/install"
-#endif
-
-#if (defined(__clang__) && defined(__has_feature))
-#if (!__has_feature(cxx_range_for))
-#error "clang version 3.0+ is required for C++11 features - please see https://sharp.pixelplumbing.com/install"
+#if defined(__has_include)
+#if !__has_include(<filesystem>)
+#error "C++17 compiler required - please see https://sharp.pixelplumbing.com/install"
 #endif
 #endif
 
diff --git a/src/pipeline.cc b/src/pipeline.cc
index 4f8424725..cd9294494 100644
--- a/src/pipeline.cc
+++ b/src/pipeline.cc
@@ -3,6 +3,7 @@
 
 #include <algorithm>
 #include <cmath>
+#include <filesystem>
 #include <map>
 #include <memory>
 #include <numeric>
@@ -20,17 +21,6 @@
 #include "operations.h"
 #include "pipeline.h"
 
-#ifdef _WIN32
-#define STAT64_STRUCT __stat64
-#define STAT64_FUNCTION _stat64
-#elif defined(_LARGEFILE64_SOURCE)
-#define STAT64_STRUCT stat64
-#define STAT64_FUNCTION stat64
-#else
-#define STAT64_STRUCT stat
-#define STAT64_FUNCTION stat
-#endif
-
 class PipelineWorker : public Napi::AsyncWorker {
  public:
   PipelineWorker(Napi::Function callback, PipelineBaton *baton,
@@ -1306,9 +1296,11 @@ class PipelineWorker : public Napi::AsyncWorker {
         Callback().Call(Receiver().Value(), { env.Null(), data, info });
       } else {
         // Add file size to info
-        struct STAT64_STRUCT st;
-        if (STAT64_FUNCTION(baton->fileOut.data(), &st) == 0) {
-          info.Set("size", static_cast<uint32_t>(st.st_size));
+        if (baton->formatOut != "dz" || sharp::IsDzZip(baton->fileOut)) {
+          try {
+            uint32_t const size = static_cast<uint32_t>(std::filesystem::file_size(baton->fileOut));
+            info.Set("size", size);
+          } catch (...) {}
         }
         Callback().Call(Receiver().Value(), { env.Null(), info });
       }
diff --git a/test/unit/tile.js b/test/unit/tile.js
index d1b3d831c..53e91bf5d 100644
--- a/test/unit/tile.js
+++ b/test/unit/tile.js
@@ -483,7 +483,7 @@ describe('Tile', function () {
             assert.strictEqual(2725, info.width);
             assert.strictEqual(2225, info.height);
             assert.strictEqual(3, info.channels);
-            assert.strictEqual('number', typeof info.size);
+            assert.strictEqual(undefined, info.size);
             fs.stat(path.join(directory, 'ImageProperties.xml'), function (err, stat) {
               if (err) throw err;
               assert.strictEqual(true, stat.isFile());
@@ -509,7 +509,7 @@ describe('Tile', function () {
             assert.strictEqual(2725, info.width);
             assert.strictEqual(2225, info.height);
             assert.strictEqual(3, info.channels);
-            assert.strictEqual('number', typeof info.size);
+            assert.strictEqual(undefined, info.size);
             assertZoomifyTiles(directory, 256, 1, done);
           });
       });
@@ -530,7 +530,7 @@ describe('Tile', function () {
             assert.strictEqual(2725, info.width);
             assert.strictEqual(2225, info.height);
             assert.strictEqual(3, info.channels);
-            assert.strictEqual('number', typeof info.size);
+            assert.strictEqual(undefined, info.size);
             assertZoomifyTiles(directory, 256, 5, done);
           });
       });
@@ -551,7 +551,7 @@ describe('Tile', function () {
             assert.strictEqual(2725, info.width);
             assert.strictEqual(2225, info.height);
             assert.strictEqual(3, info.channels);
-            assert.strictEqual('number', typeof info.size);
+            assert.strictEqual(undefined, info.size);
             assertZoomifyTiles(directory, 256, 13, done);
           });
       });
@@ -575,7 +575,7 @@ describe('Tile', function () {
             assert.strictEqual(2048, info.width);
             assert.strictEqual(1536, info.height);
             assert.strictEqual(3, info.channels);
-            assert.strictEqual('number', typeof info.size);
+            assert.strictEqual(undefined, info.size);
             assertZoomifyTiles(directory, 256, 4, done);
           });
       });
@@ -594,7 +594,7 @@ describe('Tile', function () {
             assert.strictEqual(2725, info.width);
             assert.strictEqual(2225, info.height);
             assert.strictEqual(3, info.channels);
-            assert.strictEqual('number', typeof info.size);
+            assert.strictEqual(undefined, info.size);
             fs.stat(path.join(directory, '0', '0', '0.jpg'), function (err, stat) {
               if (err) throw err;
               assert.strictEqual(true, stat.isFile());
@@ -621,7 +621,7 @@ describe('Tile', function () {
             assert.strictEqual(2725, info.width);
             assert.strictEqual(2225, info.height);
             assert.strictEqual(3, info.channels);
-            assert.strictEqual('number', typeof info.size);
+            assert.strictEqual(undefined, info.size);
             const sample = path.join(directory, '0', '0', '0.jpg');
             sharp(sample).metadata(function (err, metadata) {
               if (err) throw err;
@@ -658,7 +658,7 @@ describe('Tile', function () {
             assert.strictEqual(2725, info.width);
             assert.strictEqual(2225, info.height);
             assert.strictEqual(3, info.channels);
-            assert.strictEqual('number', typeof info.size);
+            assert.strictEqual(undefined, info.size);
             const sample = path.join(directory, '0', '0', '0.png');
             sharp(sample).metadata(function (err, metadata) {
               if (err) throw err;
@@ -696,7 +696,7 @@ describe('Tile', function () {
             assert.strictEqual(2725, info.width);
             assert.strictEqual(2225, info.height);
             assert.strictEqual(3, info.channels);
-            assert.strictEqual('number', typeof info.size);
+            assert.strictEqual(undefined, info.size);
             const sample = path.join(directory, '0', '0', '0.webp');
             sharp(sample).metadata(function (err, metadata) {
               if (err) throw err;
@@ -732,8 +732,7 @@ describe('Tile', function () {
             assert.strictEqual(2725, info.width);
             assert.strictEqual(2225, info.height);
             assert.strictEqual(3, info.channels);
-            assert.strictEqual('number', typeof info.size);
-
+            assert.strictEqual(undefined, info.size);
             assertGoogleTiles(directory, 256, 1, done);
           });
       });
@@ -754,8 +753,7 @@ describe('Tile', function () {
             assert.strictEqual(2725, info.width);
             assert.strictEqual(2225, info.height);
             assert.strictEqual(3, info.channels);
-            assert.strictEqual('number', typeof info.size);
-
+            assert.strictEqual(undefined, info.size);
             assertGoogleTiles(directory, 256, 5, done);
           });
       });
@@ -779,8 +777,7 @@ describe('Tile', function () {
             assert.strictEqual(2809, info.width);
             assert.strictEqual(2074, info.height);
             assert.strictEqual(3, info.channels);
-            assert.strictEqual('number', typeof info.size);
-
+            assert.strictEqual(undefined, info.size);
             assertGoogleTiles(directory, 256, 5, done);
           });
       });
@@ -800,7 +797,7 @@ describe('Tile', function () {
             assert.strictEqual(2725, info.width);
             assert.strictEqual(2225, info.height);
             assert.strictEqual(3, info.channels);
-            assert.strictEqual('number', typeof info.size);
+            assert.strictEqual(undefined, info.size);
             fixtures.assertSimilar(fixtures.expected('tile_centered.jpg'), fs.readFileSync(path.join(directory, '0', '0', '0.jpg')), done);
           });
       });
@@ -820,7 +817,7 @@ describe('Tile', function () {
             assert.strictEqual(2725, info.width);
             assert.strictEqual(2225, info.height);
             assert.strictEqual(3, info.channels);
-            assert.strictEqual('number', typeof info.size);
+            assert.strictEqual(undefined, info.size);
             fixtures.assertSimilar(fixtures.expected('tile_centered.jpg'), fs.readFileSync(path.join(directory, '0', '0', '0.jpg')), done);
           });
       });
@@ -842,7 +839,7 @@ describe('Tile', function () {
             assert.strictEqual(2725, info.width);
             assert.strictEqual(2225, info.height);
             assert.strictEqual(3, info.channels);
-            assert.strictEqual('number', typeof info.size);
+            assert.strictEqual(undefined, info.size);
             const infoJson = require(path.join(directory, 'info.json'));
             assert.strictEqual('http://iiif.io/api/image/2/context.json', infoJson['@context']);
             assert.strictEqual(`${id}/${name}`, infoJson['@id']);
@@ -872,7 +869,7 @@ describe('Tile', function () {
             assert.strictEqual(2725, info.width);
             assert.strictEqual(2225, info.height);
             assert.strictEqual(3, info.channels);
-            assert.strictEqual('number', typeof info.size);
+            assert.strictEqual(undefined, info.size);
             const infoJson = require(path.join(directory, 'info.json'));
             assert.strictEqual('http://iiif.io/api/image/3/context.json', infoJson['@context']);
             assert.strictEqual('ImageService3', infoJson.type);