diff --git a/doc/fugitive.txt b/doc/fugitive.txt
index a098297..d7038e7 100644
--- a/doc/fugitive.txt
+++ b/doc/fugitive.txt
@@ -175,6 +175,9 @@ that are part of Git repositories).
                         along to git-blame.  The following maps, which work on
                         the cursor line commit where sensible, are provided:
 
+                        A     resize to end of author column
+                        C     resize to end of commit column
+                        D     resize to end of date/time column
                         q     close blame and return to blamed window
                         gq    q, then |:Gedit| to return to work tree version
                         i     q, then open commit
diff --git a/plugin/fugitive.vim b/plugin/fugitive.vim
index 96cd1d6..a03cfb8 100644
--- a/plugin/fugitive.vim
+++ b/plugin/fugitive.vim
@@ -1513,6 +1513,10 @@ augroup fugitive_blame
   autocmd User Fugitive if s:buffer().type('file', 'blob') | exe "command! -buffer -bar -bang -range=0 -nargs=* Gblame :execute s:Blame(<bang>0,<line1>,<line2>,<count>,[<f-args>])" | endif
 augroup END
 
+function! s:linechars(pattern)
+  return strlen(s:gsub(matchstr(getline('.'), a:pattern), '.', '.'))
+endfunction
+
 function! s:Blame(bang,line1,line2,count,args) abort
   try
     if s:buffer().path() == ''
@@ -1577,7 +1581,7 @@ function! s:Blame(bang,line1,line2,count,args) abort
         execute top
         normal! zt
         execute current
-        execute "vertical resize ".(match(getline('.'),'\s\+\d\+)')+1)
+        execute "vertical resize ".(s:linechars('.\{-\}\d\ze\s\+\d\+)')+1)
         setlocal nomodified nomodifiable nonumber scrollbind nowrap foldcolumn=0 nofoldenable filetype=fugitiveblame
         if exists('+relativenumber')
           setlocal norelativenumber
@@ -1591,6 +1595,9 @@ function! s:Blame(bang,line1,line2,count,args) abort
         nnoremap <buffer> <silent> i    :<C-U>exe <SID>BlameCommit("exe 'norm q'<Bar>edit")<CR>
         nnoremap <buffer> <silent> o    :<C-U>exe <SID>BlameCommit((&splitbelow ? "botright" : "topleft")." split")<CR>
         nnoremap <buffer> <silent> O    :<C-U>exe <SID>BlameCommit("tabedit")<CR>
+        nnoremap <buffer> <silent> A    :<C-u>exe "vertical resize ".(<SID>linechars('.\{-\}\ze \d\{4\}-\d\d-\d\d ')+1)<CR>
+        nnoremap <buffer> <silent> C    :<C-u>exe "vertical resize ".(<SID>linechars('^\S\+')+1)<CR>
+        nnoremap <buffer> <silent> D    :<C-u>exe "vertical resize ".(<SID>linechars('.\{-\}\ze\d\ze\s\+\d\+)')+1)<CR>
         redraw
         syncbind
       endif