# Measuring a Doorway or Staircase for a Safety Gate How should I measure a doorway or staircase opening to find the right safety gate size? Stair Barrier Banister\-to\-Banister \(BB\) Fabric Safety Gate: Measure from the innermost edge of one banister to the innermost edge of the other; for curved volute banisters measure spindle to spindle\. The Regular size fits openings from 36 to 43 inches\. Stair Barrier Wall\-to\-Banister \(WB\) Fabric Safety Gate: The gate is made in two opening widths: Regular for 36 to 43 inch openings and Wide for 43\+ to 52 inch openings\. When used at the top of stairs, install it at least 10 inches back from the first tread\. ### 1. [The Stair Barrier Banister\-to\-Banister \(BB\) Fabric Safety Gate](/products/ucp/strolleria-com/8161404289098) (sold by strolleria\.com) Measure from the innermost edge of one banister to the innermost edge of the other; for curved volute banisters measure spindle to spindle\. - Opening size: The Regular size fits openings from 36 to 43 inches\. (guide) - Measuring method: Measure from the innermost edge of one banister to the innermost edge of the other; for curved volute banisters measure spindle to spindle\. (guide) - Top of stairs: - ### 2. [The Stair Barrier Wall\-to\-Banister \(WB\) Fabric Safety Gate](/products/ucp/strolleria-com/8161404321866) (sold by strolleria\.com) The gate is made in two opening widths: Regular for 36 to 43 inch openings and Wide for 43\+ to 52 inch openings\. - Opening size: The gate is made in two opening widths: Regular for 36 to 43 inch openings and Wide for 43\+ to 52 inch openings\. (listing) - Measuring method: - - Top of stairs: When used at the top of stairs, install it at least 10 inches back from the first tread\. (manual) Every value in the table is a fact RoboTrunk checked, linked to the page it came from\. A dash means no checked fact fills that cell\. Prices and stock change, so this page prints neither: each product name links to its RoboTrunk page, which shows them live\. Written 2026-10-17T20:13:17.753Z. This page is published by RoboTrunk, a store built for shopping agents. The store named on this page sells the product and ships it. RoboTrunk is not the seller and never holds the money. Buying works in one path. RoboTrunk's tools prepare a checkout at that store, then hand back a short-lived link. The person approves the total; once RoboTrunk has checked the store's total against it, the person is given the checkout link to tap in their own browser, or, if the person prefers and gives permission, their agent may open the link and finish there, and payment always happens on the store's own checkout page. RoboTrunk never takes the payment or sees a card. Where the rest of this site is: - /agent/story.md is what RoboTrunk is and how it works, in full. - /agent/tools.json is every tool, its arguments and its answers. - /agent/merchants is every store you can buy from through RoboTrunk. - /products/ucp is every store's indexed products. - /products/search is one search across every store, in plain words. - [What RoboTrunk is](/agent/story.md) - [Every tool, in your browser through WebMCP](/agent) - [The tools and how to call them](/agent/tools.json) - [The stores you can buy from](/agent/merchants) - [Every store's products](/products/ucp) - [Search every store at once](/products/search)