Answers.Body: <p>The ones that come with extras are almost always the smallest pieces in the kit that would be easy to lose and are negligible in weight.</p>
  
  <p>From <a href="http://lego.gizmodo.com/5019797/everything-you-always-wanted-to-know-about-lego" rel="nofollow">gizmodo article of LEGO FAQs</a>:</p>
  
  <blockquote>
    <p><strong>Why did I always have pieces left over when I built my castle sets? Do they just do that to jack with kids?</strong></p>
    
    <p>For two reasons: first, because some pieces are so small that they weigh too little to be measured by their scale, during packaging (you will see this when I publish the factory tour. J.) Second, because it's better to have too many of those pieces than have one of them missing. Since we statistically know what pieces may get lost, we include some extras when appropriate.</p>
  </blockquote>
  
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2014-02-25T16:35:34.857Z
Answers.Text: thank you Zhaph-Ben for the edit. I couldn't figure out how to make the nice quotation box on the android app editor.
Answers.UserDisplayName: Jessica Brown
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2014-02-25T16:36:41.660Z
Answers.Text: PS: the url of that FAQ is http://lego.gizmodo.com/5019797/everything-you-always-wanted-to-know-about-lego
Answers.UserDisplayName: Jessica Brown
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2014-02-26T10:50:59.043Z
Answers.Text: It's all about [knowing the markdown](http://bricks.stackexchange.com/editing-help#simple-blockquotes) which still works in the app ;) But yes, it's certainly more bare metal when you're in the app.
Answers.UserDisplayName: Zhaph - Ben Duguid
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2014-02-23T22:09:21.070Z
Answers.LastActivityDate: 2014-02-26T10:48:56.923Z
Answers.LastEditDate: 2014-02-26T10:48:56.923Z
Answers.UserDisplayName: Jessica Brown
Body: <p>I know <a href="https://bricks.stackexchange.com/q/852/3176"><em>why</em> there are extra pieces in the sets</a>, but I'm curious to find out which pieces will typically have an extra.</p>
  
  <p>I know that usually 1x1 plates (both square and round) will have an extra included in the set, as well as cheese wedges. But I was surprised to find an extra <em>double</em> cheese wedge included once (I don't remember which set it was, but no, it wasn't a piece I overlooked in the building instructions). I have other sets with double cheese wedges that didn't have an extra, so I wonder:</p>
  
  <p>Is there a list of pieces that will usually come with an extra?</p>
  
  <p>Are there other criteria used to determine whether a piece will have an extra?</p>
  
Comments.ContentLicense: CC BY-SA 3.0
Comments.CreationDate: 2014-02-23T21:07:32.120Z
Comments.Text: The inventory of parts provided for sets on [Bricklink](http://www.bricklink.com/help.asp?helpID=1562) show which parts are considered extra. It might be possible to calculate which extra parts are the most common across the database of sets.
Comments.UserDisplayName: Ambo100
Comments.ContentLicense: CC BY-SA 3.0
Comments.CreationDate: 2014-02-24T08:31:02.817Z
Comments.Text: It's highly variable. I've had some sets with some of the smaller piece and ZERO spares. On the other extreme, the 2013 Star Wars advent calendar had up to THREE spares of the usual pieces and even bigger than usual (cups, beards) pieces, bringing the total number of pieces to nearly 150% of the number stated on the box.
Comments.UserDisplayName: gev
Comments.ContentLicense: CC BY-SA 3.0
Comments.CreationDate: 2018-01-26T05:51:32.677Z
Comments.Text: Back in the day, it was because some of the pieces such as 1x1 round plates or flower petals came still attached to the sprues -- 1x1 round plates would always come as a multiple of two, while flowers would come as a multiple of four.
Comments.UserDisplayName: Mark
Comments.ContentLicense: CC BY-SA 3.0
Comments.CreationDate: 2018-01-26T06:14:50.420Z
Comments.Text: @Mark you're right! I had totally forgotten.
Comments.UserDisplayName: SQB
Tags: <sets><piece-information>
Title: Which bricks warrant an extra to be included in a set?
UserDisplayName: SQB
ThreadText: # Which bricks warrant an extra to be included in a set?
  
  (Asked by: username_0 on 2014-02-23)
  
  I know [*why* there are extra pieces in the sets](https://bricks.stackexchange.com/q/852/3176), but I'm curious to find out which pieces will typically have an extra.
  
  I know that usually 1x1 plates (both square and round) will have an extra included in the set, as well as cheese wedges. But I was surprised to find an extra *double* cheese wedge included once (I don't remember which set it was, but no, it wasn't a piece I overlooked in the building instructions). I have other sets with double cheese wedges that didn't have an extra, so I wonder:
  
  Is there a list of pieces that will usually come with an extra?
  
  Are there other criteria used to determine whether a piece will have an extra?
  
  **Tags:** sets, piece-information
  > **Comments:**
  > **username_1**: The inventory of parts provided for sets on [Bricklink](http://www.bricklink.com/help.asp?helpID=1562) show which parts are considered extra. It might be possible to calculate which extra parts are the most common across the database of sets.  
  > **username_2**: It's highly variable. I've had some sets with some of the smaller piece and ZERO spares. On the other extreme, the 2013 Star Wars advent calendar had up to THREE spares of the usual pieces and even bigger than usual (cups, beards) pieces, bringing the total number of pieces to nearly 150% of the number stated on the box.  
  > **username_3**: Back in the day, it was because some of the pieces such as 1x1 round plates or flower petals came still attached to the sprues -- 1x1 round plates would always come as a multiple of two, while flowers would come as a multiple of four.  
  > **username_0**: @Mark you're right! I had totally forgotten.  
  
  ---
  
  ## 1 answers
  
  ### Answer by username_4 on 2014-02-23. Score: 5
  
  The ones that come with extras are almost always the smallest pieces in the kit that would be easy to lose and are negligible in weight.
  
  From [gizmodo article of LEGO FAQs](http://lego.gizmodo.com/5019797/everything-you-always-wanted-to-know-about-lego):
  
  > **Why did I always have pieces left over when I built my castle sets? Do they just do that to jack with kids?**
  >
  > For two reasons: first, because some pieces are so small that they weigh too little to be measured by their scale, during packaging (you will see this when I publish the factory tour. J.) Second, because it's better to have too many of those pieces than have one of them missing. Since we statistically know what pieces may get lost, we include some extras when appropriate.
  
  > **Comments:**
  > **username_4**: thank you Zhaph-Ben for the edit. I couldn't figure out how to make the nice quotation box on the android app editor.  
  > **username_4**: PS: the url of that FAQ is http://lego.gizmodo.com/5019797/everything-you-always-wanted-to-know-about-lego  
  > **username_5**: It's all about [knowing the markdown](http://bricks.stackexchange.com/editing-help#simple-blockquotes) which still works in the app ;) But yes, it's certainly more bare metal when you're in the app.  
  
  ---
  
  