{{ form_start(form) }}
<div class="row">
    <div class="col-md-4">{{ form_row(form.name) }}</div>
    <div class="col-md-4">{{ form_row(form.format) }}</div>
    <div class="col-md-4">{{ form_row(form.epaisseur) }}</div>
</div>
<div class="row">
    <div class="col-md-4">{{ form_row(form.bords) }}</div>
    <div class="col-md-4">{{ form_row(form.calibre) }}</div>
    <div class="col-md-4">{{ form_row(form.materiau) }}</div>
</div>
<div class="row">
    <div class="col-md-4">{{ form_row(form.specificite) }}</div>
</div>
{{ form_widget(form) }}
<button class="btn-save">{{ button|default('Enregistrer') }}</button>
{{ form_end(form) }}