I am trying to create a paper format that is going to be printed in a thermal printer which has a paper roll, the problem is that in the model report.paperformat have to be defined the height, but in a paper roll that doesnt have sense, how can achieve to create a paper format that behaves like dynamic height depending in its content?.

I am defining the paperformat like this:

<record id="paperformat_invoice_ticket" model="report.paperformat">
    <field name="name">Factura formato ticket</field>
    <field name="default" eval="True" />
    <field name="format">custom</field>
    <field name="page_height">150</field>
    <field name="page_width">80</field>
    <field name="orientation">Portrait</field>
    <field name="margin_top">0</field>
    <field name="margin_bottom">0</field>
    <field name="margin_left">0</field>
    <field name="margin_right">0</field>
    <field name="header_line" eval="False" />
    <field name="dpi">90</field>
</record>

And the template is like this:

<template id="report_invoice_formato_ticket">
    <t t-call="web.internal_layout">
        <div class="page">
              <!--code of template-->        
        </div>

    </t>
</template>