@david.hubert.cook -- Thanks for reporting this issue. Could you please provide the detailed steps and sample URL to reproduce the issue. This will help us in further triaging the issue.

Thanks in advance.

	<!-- This SHOULD (but doesn't on Android( initially render with first 3 options visible -->
	<select id="selectID" size="3" >
    		<option value="Aaa" >A</option>
		<option value="Bbb" >B</option>
		<option value="Ccc" >C</option>
		
		<option value="Xxx" >X</option>
		<option value="Yyy" >Y</option>
		<option value="Zzz" >Z</option>
	</select>

Thank you for providing more feedback. Adding requester "pnangunoori@chromium.org" to the cc list and removing "Needs-Feedback" label.

For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot

Tested the issue in Android and not able to reproduce the issue.

Steps Followed:
1. Created a HTML file with sample code provided in the C#3.
2. Launched the Chrome Browser.
3. Tap on the Dropdown arrow displayed.
4. Observed that A, B, C, X, Y, Z values are displayed and user is able to select the desired value.

Chrome versions tested:
62.0.3202.84, 62.0.3202.89(Stable), 63.0.32329.41 (Beta), 64.0.3268.2 (Canary)

OS:
Android 8.1.0, Android 7.0.0

Android Devices:
Pixel XL Build/OPM1.171019, SM-J710F Build/NRD90M

@david.hubert.cook -- Thanks for providing sample code. Could you please provide the device details in which the issue is reproduced.

Thanks in advance.

Closing this issue due to lack of feedback from reporter. 

Please feel free to file a new issue if the issue is still observed in latest Chrome #64.0.3282.123.

Thanks!