diff --git a/lib/galaxy/datatypes/data.py b/lib/galaxy/datatypes/data.py
index 2c12f640af76..5994682784cc 100644
--- a/lib/galaxy/datatypes/data.py
+++ b/lib/galaxy/datatypes/data.py
@@ -1100,7 +1100,7 @@ def set_peek(self, dataset: DatasetProtocol, **kwd) -> None:
                     else:
                         est_lines = self.estimate_file_lines(dataset)
                         if est_lines is not None:
-                            dataset.blurb = f"~{util.commaify(util.roundify(str(est_lines)))} {inflector.cond_plural(est_lines, self.line_class)}"
+                            dataset.blurb = f"~{util.shorten_with_metric_prefix(est_lines)} {inflector.cond_plural(est_lines, self.line_class)}"
                         else:
                             dataset.blurb = "Error: Cannot estimate lines in dataset"
             else:
diff --git a/lib/galaxy/datatypes/tabular.py b/lib/galaxy/datatypes/tabular.py
index 87d709e75998..d5181188fda1 100644
--- a/lib/galaxy/datatypes/tabular.py
+++ b/lib/galaxy/datatypes/tabular.py
@@ -127,6 +127,7 @@ def set_meta(self, dataset: DatasetProtocol, *, overwrite: bool = True, **kwd) -
     def set_peek(self, dataset: DatasetProtocol, **kwd) -> None:
         kwd.setdefault("line_wrap", False)
         super().set_peek(dataset, **kwd)
+        dataset.blurb = f"{dataset.blurb} {dataset.metadata.columns} columns"
         if dataset.metadata.comment_lines:
             dataset.blurb = f"{dataset.blurb}, {util.commaify(str(dataset.metadata.comment_lines))} comments"
 
diff --git a/lib/galaxy/util/__init__.py b/lib/galaxy/util/__init__.py
index 6949dbafbb71..31e798a0495f 100644
--- a/lib/galaxy/util/__init__.py
+++ b/lib/galaxy/util/__init__.py
@@ -1135,16 +1135,6 @@ def commaify(amount):
         return commaify(new)
 
 
-def roundify(amount, sfs=2):
-    """
-    Take a number in string form and truncate to 'sfs' significant figures.
-    """
-    if len(amount) <= sfs:
-        return amount
-    else:
-        return amount[0:sfs] + "0" * (len(amount) - sfs)
-
-
 @overload
 def unicodify(  # type: ignore[misc]
     value: Literal[None],
@@ -1470,7 +1460,65 @@ def docstring_trim(docstring):
     return "\n".join(trimmed)
 
 
-def nice_size(size):
+def metric_prefix(number: Union[int, float], base: int) -> Tuple[float, str]:
+    """
+    >>> metric_prefix(100, 1000)
+    (100.0, '')
+    >>> metric_prefix(999, 1000)
+    (999.0, '')
+    >>> metric_prefix(1000, 1000)
+    (1.0, 'K')
+    >>> metric_prefix(1001, 1000)
+    (1.001, 'K')
+    >>> metric_prefix(1000000, 1000)
+    (1.0, 'M')
+    >>> metric_prefix(1000**10, 1000)
+    (1.0, 'Q')
+    >>> metric_prefix(1000**11, 1000)
+    (1000.0, 'Q')
+    """
+    prefixes = ["", "K", "M", "G", "T", "P", "E", "Z", "Y", "R", "Q"]
+    if number < 0:
+        number = abs(number)
+        sign = -1
+    else:
+        sign = 1
+
+    for prefix in prefixes:
+        if number < base:
+            return sign * float(number), prefix
+        number /= base
+    else:
+        return sign * float(number) * base, prefix
+
+
+def shorten_with_metric_prefix(amount: int) -> str:
+    """
+    >>> shorten_with_metric_prefix(23000)
+    '23K'
+    >>> shorten_with_metric_prefix(2300000)
+    '2.3M'
+    >>> shorten_with_metric_prefix(23000000)
+    '23M'
+    >>> shorten_with_metric_prefix(1)
+    '1'
+    >>> shorten_with_metric_prefix(0)
+    '0'
+    >>> shorten_with_metric_prefix(100)
+    '100'
+    >>> shorten_with_metric_prefix(-100)
+    '-100'
+    """
+    m, prefix = metric_prefix(amount, 1000)
+    m_str = str(int(m)) if m.is_integer() else f"{m:.1f}"
+    exp = f"{m_str}{prefix}"
+    if len(exp) <= len(str(amount)):
+        return exp
+    else:
+        return str(amount)
+
+
+def nice_size(size: Union[float, int, str]) -> str:
     """
     Returns a readably formatted string with the size
 
@@ -1483,23 +1531,15 @@ def nice_size(size):
     >>> nice_size(100000000)
     '95.4 MB'
     """
-    words = ["bytes", "KB", "MB", "GB", "TB", "PB", "EB"]
-    prefix = ""
     try:
         size = float(size)
-        if size < 0:
-            size = abs(size)
-            prefix = "-"
-    except Exception:
+    except ValueError:
         return "??? bytes"
-    for ind, word in enumerate(words):
-        step = 1024 ** (ind + 1)
-        if step > size:
-            size = size / float(1024**ind)
-            if word == "bytes":  # No decimals for bytes
-                return "%s%d bytes" % (prefix, size)
-            return f"{prefix}{size:.1f} {word}"
-    return "??? bytes"
+    size, prefix = metric_prefix(size, 1024)
+    if prefix == "":
+        return "%d bytes" % size
+    else:
+        return f"{size:.1f} {prefix}B"
 
 
 def size_to_bytes(size):