title: ItemSize in DynamoDB
body: <p>I'm trying to compute the size of an item in dynamoDB and I'm not able to understand the definition.</p>
  <p>The definition I found : <em>An item size is the sum of lengths of its attribute names and values (binary and UTF-8 lengths). So it helps if you keep attribute names short.</em></p>
  <p>Does it mean that if I put a number in the database, example: 1 it'll take the size of an int? a long? a double? Will it take the same amount of space than 100 or 1000000 or it'll take only the size of the corresponding binary?</p>
  <p>And what is the computing for String?</p>
  <p>Is there someone that knows how to compute it?</p>