# [NTG-context] Question to covers

Hans Hagen j.hagen at xs4all.nl
Sat Jul 21 22:06:39 CEST 2018

```On 7/21/2018 7:12 PM, Henning Hraban Ramm wrote:
> Hi Wolfgang,
>
> thank you so much!
>
> If we put the externalfigure setup in front, we can also calculate the spine width:
>
> \getfiguredimensions[MAG]
> \definemeasure [SpineWidth] [\dimexpr0.01mm * (\noffigurepages/2) + 0.5mm\relax]
>
> Where 0.01mm is the paper thickness (100 g/m2) and 0.5mm is the folding addition – ask your printshop/bookbinder how much they need!
it's on my agenda for a while to make some helpers for spines (esp handy
for MP), there is actually already a variable for a while

but .. too hot now (and i need to work on the house)

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