Google Sheets Label Generator

I need a small Google-Sheets based tool that lets me type each customer’s name and mobile number once and instantly lays them out as tiny, evenly sized boxes on an A4 sheet, ready to print on adhesive-sticker paper.

Key points
• Each label shows only the customer name and number for now.
• I normally squeeze well over 48 labels onto one A4 page, so the script has to calculate very small but readable box dimensions and pack them efficiently in neat rows and columns.
• Labels must keep their grid alignment when exported to PDF or printed, so they line up perfectly with my pre-cut sticker sheets.
• I also want extra columns in the same sheet where I can note meal count, meal type and the delivery boy’s name; even if these fields are blank today, they should be easy to add to the label later.
• The list is sorted by delivery route, with the first stop appearing at the top left of the print-out and the rest following in order.

Deliverable
A Google Sheet (with any necessary Apps Script) that:
1. Accepts my raw order list.
2. Auto-generates the printable label grid.
3. Preserves spacing when printed to A4.
4. Lets me re-sort or filter the data without breaking the layout.

If you have done similar mail-merge or label work inside Google Workspace, your experience will be a big plus.