title: What length should I give to a MYSQL VARCHAR field that stores a signature in JSON?
body: <p>I'm trying to store signatures in a database. I'm using a the signature pad plugin (<a href="http://thomasjbradley.ca/lab/signature-pad/" rel="nofollow">signaturePad</a>) which converts from <code>canvas</code> to <code>JSON</code> and now want to store the signature in <code>MySQL</code>.</p>
  
  <p>I'm using a <code>VARCHAR</code> field, but I'm not sure which length I should allow. I tried several times and usually end up with a string between 2000 and 3000 characters.</p>
  
  <p><strong>Question:</strong><br>
  What should I use for field length in MYSQL? I don't know how the <code>CANVAS=&gt;JSON</code> conversion is done, so maybe someone can give me a pointer on what to expect?</p>
  
  <p>Thanks!</p>