diff --git a/NEWS.md b/NEWS.md
index f1082b8f..299ccde7 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -1,3 +1,7 @@
+# Changes in version 2025.10.31 (PR#272)
+
+- Download status table now displays three new columns: `total_MB` (total disk space used by all downloaded chunks), `mean_MB` (average chunk size), and `rows` (total number of data rows). Chunk sizes are calculated in R using `file.size()` and exported via plot.json for efficient display updates after each chunk download.
+
 # Changes in version 2025.10.31 (PR#271)
 
 - `geom_point()` now warns when shape parameter is set to a value other than 21, since animint2 web rendering only supports shape=21 for proper display of both color and fill aesthetics.
diff --git a/R/geom-.r b/R/geom-.r
index 92e2b8a3..f7707b32 100644
--- a/R/geom-.r
+++ b/R/geom-.r
@@ -632,6 +632,14 @@ Geom <- gganimintproto("Geom",
       data.table::fwrite(
         data.or.null$common, file = tsv.path,
         row.names = FALSE, sep = "\t")
+      # Track common chunk size and rows
+      if(!exists("chunk_info", envir=meta)) {
+        meta$chunk_info <- list()
+      }
+      meta$chunk_info[[tsv.name]] <- list(
+        bytes = file.size(tsv.path),
+        rows = nrow(data.or.null$common)
+      )
       data.or.null$varied
     }
     list(g=g, g.data.varied=g.data.varied, timeValues=AnimationInfo$timeValues)
diff --git a/R/z_animint.R b/R/z_animint.R
index 3beb7dd7..53958970 100644
--- a/R/z_animint.R
+++ b/R/z_animint.R
@@ -212,8 +212,21 @@ storeLayer <- function(meta, g, g.data.varied){
   ## Save each variable chunk to a separate tsv file.
   meta$chunk.i <- 1L
   meta$g <- g
+  # Initialize chunk_info only if it doesn't exist (common chunk may have been saved)
+  if(!exists("chunk_info", envir=meta)) {
+    meta$chunk_info <- list()
+  }
   g$chunks <- saveChunks(g.data.varied, meta)
   g$total <- length(unlist(g$chunks))
+  
+  ## Add chunk size information to geom - filter to only this geom's chunks
+  g$chunk_info <- list()
+  geom_prefix <- paste0(g$classed, "_chunk")
+  for(chunk_name in names(meta$chunk_info)) {
+    if(startsWith(chunk_name, geom_prefix)) {
+      g$chunk_info[[chunk_name]] <- meta$chunk_info[[chunk_name]]
+    }
+  }
 
   ## Finally save to the master geom list.
   meta$geoms[[g$classed]] <- g
diff --git a/R/z_animintHelpers.R b/R/z_animintHelpers.R
index f3686454..1de93360 100644
--- a/R/z_animintHelpers.R
+++ b/R/z_animintHelpers.R
@@ -917,9 +917,21 @@ saveChunks <- function(x, meta){
     # fwrite defaults ensure fields are quoted so that embedded
     # newlines or tabs in string fields do not break the TSV format
     # when read by d3.tsv.
+    csv.path <- file.path(meta$out.dir, csv.name)
     data.table::fwrite(
-      na.omit(x), file.path(meta$out.dir, csv.name),
+      na.omit(x), csv.path,
       row.names=FALSE, sep="\t")
+    # Calculate chunk size and row count
+    chunk_bytes <- file.size(csv.path)
+    chunk_rows <- nrow(na.omit(x))
+    # Store chunk info
+    if(!exists("chunk_info", envir=meta)) {
+      meta$chunk_info <- list()
+    }
+    meta$chunk_info[[csv.name]] <- list(
+      bytes = chunk_bytes,
+      rows = chunk_rows
+    )
     meta$chunk.i <- meta$chunk.i + 1L
     this.i
   }else if(is.list(x)){
diff --git a/inst/htmljs/animint.js b/inst/htmljs/animint.js
index 02c8d760..be204f36 100644
--- a/inst/htmljs/animint.js
+++ b/inst/htmljs/animint.js
@@ -225,10 +225,31 @@ var animint = function (to_select, json_file) {
     // Add a row to the loading table.
     g_info.tr = Widgets["loading"].append("tr");
     g_info.tr.append("td").text(g_name);
-    g_info.tr.append("td").attr("class", "chunk");
-    g_info.tr.append("td").attr("class", "downloaded").text(0);
-    g_info.tr.append("td").text(g_info.total);
-    g_info.tr.append("td").attr("class", "status").text("initialized");
+    g_info.td_files = g_info.tr.append("td").attr("class", "files").style("text-align", "right");
+    g_info.td_MB = g_info.tr.append("td").attr("class", "MB").style("text-align", "right");
+    g_info.td_rows = g_info.tr.append("td").attr("class", "rows").style("text-align", "right");
+    
+    // Initialize size tracking
+    g_info.total_bytes = 0;
+    g_info.total_rows = 0;
+    g_info.downloaded_chunks = 0;
+    
+    // Calculate total possible bytes and rows from chunk_info
+    g_info.possible_bytes = 0;
+    g_info.possible_rows = 0;
+    g_info.total_possible_chunks = g_info.total;
+    if(g_info.chunk_info){
+      var tsv_count = 0;
+      for(var chunk_name in g_info.chunk_info){
+        if(chunk_name.endsWith('.tsv')){
+          g_info.possible_bytes += g_info.chunk_info[chunk_name].bytes;
+          g_info.possible_rows += g_info.chunk_info[chunk_name].rows;
+          tsv_count++;
+        }
+      }
+      // chunk_info includes the common chunk, so total_possible_chunks should include it
+      g_info.total_possible_chunks = tsv_count;
+    }
 
     // load chunk tsv
     g_info.data = {};
@@ -243,6 +264,21 @@ var animint = function (to_select, json_file) {
       d3.tsv(common_path, function (error, response) {
         var converted = convert_R_types(response, g_info.types);
         g_info.data[common_tsv] = nest_by_group.map(converted);
+        // Track common chunk download for size information
+        if(g_info.chunk_info && g_info.chunk_info[common_tsv]){
+          var info = g_info.chunk_info[common_tsv];
+          g_info.total_bytes += info.bytes;
+          g_info.total_rows += info.rows;
+          g_info.downloaded_chunks += 1;
+          // Update display
+          var downloaded_count = g_info.downloaded_chunks;
+          var total_count = g_info.total_possible_chunks;
+          var downloaded_MB = (g_info.total_bytes / 1048576).toFixed(2);
+          var possible_MB = (g_info.possible_bytes / 1048576).toFixed(2);
+          g_info.td_files.text(downloaded_count + " / " + total_count);
+          g_info.td_MB.text(downloaded_MB + " / " + possible_MB);
+          g_info.td_rows.text(g_info.total_rows + " / " + g_info.possible_rows);
+        }
       });
     } else {
       g_info.common_tsv = null;
@@ -997,8 +1033,27 @@ var animint = function (to_select, json_file) {
         });
         var chunk = nest.map(response);
         g_info.data[tsv_name] = chunk;
-        g_info.tr.select("td.downloaded").text(d3.keys(g_info.data).length);
         g_info.download_status[tsv_name] = "saved";
+        
+        // Update size information after download
+        if(g_info.chunk_info && g_info.chunk_info[tsv_name]){
+          var info = g_info.chunk_info[tsv_name];
+          g_info.total_bytes += info.bytes;
+          g_info.total_rows += info.rows;
+          g_info.downloaded_chunks += 1;
+          
+          // Update display with "downloaded / total" format
+          var downloaded_count = g_info.downloaded_chunks;
+          var total_count = g_info.total_possible_chunks;
+          g_info.td_files.text(downloaded_count + " / " + total_count);
+          
+          var downloaded_MB = (g_info.total_bytes / 1048576).toFixed(2);
+          var possible_MB = (g_info.possible_bytes / 1048576).toFixed(2);
+          g_info.td_MB.text(downloaded_MB + " / " + possible_MB);
+          
+          g_info.td_rows.text(g_info.total_rows + " / " + g_info.possible_rows);
+        }
+        
         funAfter(chunk);
       });
     });
@@ -1007,7 +1062,6 @@ var animint = function (to_select, json_file) {
   // update_geom is responsible for obtaining a chunk of downloaded
   // data, and then calling draw_geom to actually draw it.
   var draw_geom = function(g_info, chunk, selector_name, PANEL){
-    g_info.tr.select("td.status").text("displayed");
     var svg = SVGs[g_info.classed];
     // derive the plot name from the geometry name
     var g_names = g_info.classed.split("_");
@@ -2372,10 +2426,9 @@ var animint = function (to_select, json_file) {
     Widgets["loading"] = loading;
     var tr = loading.append("tr");
     tr.append("th").text("geom");
-    tr.append("th").attr("class", "chunk").text("selected chunk");
-    tr.append("th").attr("class", "downloaded").text("downloaded");
-    tr.append("th").attr("class", "total").text("total");
-    tr.append("th").attr("class", "status").text("status");
+    tr.append("th").attr("class", "files").style("text-align", "right").text("files");
+    tr.append("th").attr("class", "MB").style("text-align", "right").text("MB");
+    tr.append("th").attr("class", "rows").style("text-align", "right").text("rows");
     
     // Add geoms and construct nest operators.
     for (var g_name in response.geoms) {
diff --git a/tests/testthat/test-download-status-table.R b/tests/testthat/test-download-status-table.R
new file mode 100644
index 00000000..27d1d448
--- /dev/null
+++ b/tests/testthat/test-download-status-table.R
@@ -0,0 +1,28 @@
+acontext("download status table")
+viz <- animint(
+  ggplot()+
+    geom_point(aes(Sepal.Length, Sepal.Width), data=iris)
+)
+info <- animint2HTML(viz)
+test_that("table has correct column headers", {
+  table_headers <- getNodeSet(info$html, '//table[@id="download_status"]//th')
+  header_text <- sapply(table_headers, xmlValue)
+  expect_true("geom" %in% header_text)
+  expect_true("files" %in% header_text)
+  expect_true("MB" %in% header_text)
+  expect_true("rows" %in% header_text)
+  expect_false("status" %in% header_text)
+  expect_false("mean MB" %in% header_text)
+  expect_false("selected chunk" %in% header_text)
+})
+test_that("numeric columns are right-justified", {
+  files_header <- getNodeSet(info$html, '//table[@id="download_status"]//th[@class="files"]')
+  mb_header <- getNodeSet(info$html, '//table[@id="download_status"]//th[@class="MB"]')
+  rows_header <- getNodeSet(info$html, '//table[@id="download_status"]//th[@class="rows"]')
+  expect_equal(length(files_header), 1)
+  expect_equal(length(mb_header), 1)
+  expect_equal(length(rows_header), 1)
+  expect_match(xmlGetAttr(files_header[[1]], "style"), "text-align.*right")
+  expect_match(xmlGetAttr(mb_header[[1]], "style"), "text-align.*right")
+  expect_match(xmlGetAttr(rows_header[[1]], "style"), "text-align.*right")
+})
diff --git a/tests/testthat/test-renderer1-variable-value.R b/tests/testthat/test-renderer1-variable-value.R
index 13aa8480..1da7fb01 100644
--- a/tests/testthat/test-renderer1-variable-value.R
+++ b/tests/testthat/test-renderer1-variable-value.R
@@ -269,8 +269,10 @@ test_that("Widgets for regular selectors", {
 
 chunk.counts <- function(html=getHTML()){
   node.set <-
-    getNodeSet(html, '//td[@class="downloaded"]')
-  as.integer(sapply(node.set, xmlValue))
+    getNodeSet(html, '//td[@class="files"]')
+  text.vec <- sapply(node.set, xmlValue)
+  downloaded.vec <- sapply(strsplit(text.vec, " / "), "[[", 1)
+  as.integer(downloaded.vec)
 }
 
 test_that("counts of chunks downloaded or not at first", {