diff --git a/NAMESPACE b/NAMESPACE
index 22896689..fd04757e 100644
--- a/NAMESPACE
+++ b/NAMESPACE
@@ -5,6 +5,7 @@ export("main_footer<-")
 export("main_title<-")
 export("mf_aligns<-")
 export("mf_cinfo<-")
+export("mf_col_widths<-")
 export("mf_colgap<-")
 export("mf_display<-")
 export("mf_fontspec<-")
@@ -59,6 +60,7 @@ export(make_row_df)
 export(matrix_form)
 export(mf_aligns)
 export(mf_cinfo)
+export(mf_col_widths)
 export(mf_colgap)
 export(mf_display)
 export(mf_fontspec)
diff --git a/NEWS.md b/NEWS.md
index 39b814b8..adfab098 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -1,5 +1,7 @@
 ## formatters 0.5.12.9002
 
+* Export `mf_col_widths` accessor (`getter` and `setter`).
+
 ## formatters 0.5.12
 * Added `"default"` format label which behaves like `"xx"` in `format_value` but indicates formatting behavior can be inherited from parent structures in upstream code.
 * `round_type = "sas"` no longer displays a negative sign when negative values are rounded to zero.
diff --git a/R/matrix_form.R b/R/matrix_form.R
index a884c32c..8c9e4669 100644
--- a/R/matrix_form.R
+++ b/R/matrix_form.R
@@ -625,10 +625,14 @@ mf_col_paths <- function(mf) {
   }
 }
 
+#' @export
+#' @rdname mpf_accessors
 mf_col_widths <- function(mf) {
   mf$col_widths
 }
 
+#' @export
+#' @rdname mpf_accessors
 `mf_col_widths<-` <- function(mf, value) {
   if (!is.null(value) && length(value) != NCOL(mf_strings(mf))) {
     stop(
diff --git a/man/mpf_accessors.Rd b/man/mpf_accessors.Rd
index f7c8f3ac..8670e12c 100644
--- a/man/mpf_accessors.Rd
+++ b/man/mpf_accessors.Rd
@@ -16,6 +16,8 @@
 \alias{mf_colgap}
 \alias{mf_fontspec}
 \alias{mf_fontspec<-}
+\alias{mf_col_widths}
+\alias{mf_col_widths<-}
 \alias{mf_strings<-}
 \alias{mf_spans<-}
 \alias{mf_aligns<-}
@@ -65,6 +67,10 @@ mf_fontspec(mf)
 
 mf_fontspec(mf) <- value
 
+mf_col_widths(mf)
+
+mf_col_widths(mf) <- value
+
 mf_strings(mf) <- value
 
 mf_spans(mf) <- value
diff --git a/tests/testthat/test-mpf_accessors.R b/tests/testthat/test-mpf_accessors.R
new file mode 100644
index 00000000..b62549c6
--- /dev/null
+++ b/tests/testthat/test-mpf_accessors.R
@@ -0,0 +1,12 @@
+test_that("mf_col_widths getter and setter are available and work", {
+  mf <- basic_matrix_form(mtcars)
+
+  # getter returns numeric vector
+  cw <- mf_col_widths(mf)
+  expect_true(is.numeric(cw))
+
+  # setter updates widths
+  new <- rep(10L, NCOL(mf_strings(mf)))
+  mf_col_widths(mf) <- new
+  expect_equal(mf_col_widths(mf), new)
+})