Hi Blerton,

Edit: 

I see you mentioned list. My bad haha.

What you do is already on the right track by adjusting the "width" attribute. But, as you need to know that odoo's table is auto adjusted to fit the contents. If you have a very long title and very short postcode, it will auto adjust to try to fit it as "fair" as possible. Check the reference here

If you really insist to change the width. It might be too "forcing" and I afraid mess up other columns size. You can dive into the css or js files in the web module to know what's the width for each field types.

Hope this helps.

Previous reply:

I assume you are referring to this. It would be best if you could share your current code so we can work from there.

I would suggest you to follow this code as reference only and I only write the starting from the <form> tag only

<form string="Property Form">
    <sheet>
        <div class="oe_title">
            <label for="name"/> <!-- This is the label for the name field: optional -->
            <h1><field name="name" class="oe_inline"/></h1>
        </div>
        <group>
            <group>
                <field name="postcode"/>
                <field name="available_from"/>
            </group>
            <group>
                <field name="expected_price"/>
                <field name="selling_price"/>
            </group>
        </group>
        <!-- This is a notebook with description page: I skip this -->
        <notebook></notebook>
    </sheet>
</form>

Hope this helps.

https://www.odoo.com/documentation/18.0/developer/tutorials/server_framework_101/06_basicviews.html#list

Just so we're talking about the same thing here: the columns shown in the tutorial have never been equally sized nor equally spaced to begin with.

Given a small enough view port, any list will look 'almost equally spaced' if enough columns are there.

Apart from that the width-attribute is correct. Else you would need to add a class to the list and create a stylesheet specific to it (which I wouldn't suggest you to do just for the sake of column widths unless the nature of the data in that list explicitly require it).

Ran into the same isuue. Getting results different from those expected by the tutorial is a huge bad learning experience. If the tutorial intended to delay explanations on column width customization, the tutorial should have explicitly stated this.

This was described as the form view, what I meant is the list view, where you can see all record and choose a single record to view. (I would post a picture but I dont have enough karma).

<record id="estate_property_view_list" model="ir.ui.view">
    <field name="name">estate.property.view.list</field>
    <field name="model">estate.property</field>
    <field name="arch" type="xml">
        <list string="Properties">
            <field name="title" width="150px"/>
            <field name="postcode" width="50px"/>
            <field name="bedrooms"/>
            <field name="living_area"/>
            <field name="expected_price"/>
            <field name="selling_price"/>
            <field name="date_availability"/>
        </list>
    </field>
</record>

This is the code I'm using, where I use the width attribute to kind-of fix this issue (but if there were texts longer than this they wont be entirely visible), but isn't there any better way to make it only take up as much space as it needs.

What I want is each column to take the same amount of space, these char fields mess things up.

Thanks for your time

Edit: I somehow messed this up, didn't know I had to comment your response .-.