There have been several changes to the starting line up following their defeat to Australia on Monday.
Youngster Kerry Jenkins replaces scrum half Cath Walkley and Awen Thomas replaces Rhian Wilmott at fly half, who has struggled with injuries this season.
Catrin Edwards continues to impress in the front row and is joined by the familiar faces of Dawn Mason and Jamie Kift.
Claire Donovan has been dropped and April Dent moves from her usual position at No 8 to take her place in the second row. Kylie Wilson wears the No. 8 shirt with all-rounder Jackie Morgan at Flanker.
The backs remain the same with Flowers and Jones on the wings with captain Melissa Berry and Louise Rickard in the centre. Caernarfon's Kate Jones plays at full back.
Wales have to win by 21 points to secure the second place position in their pool. Germany lost their first round game to the favourites, New Zealand 117-0, so the Welsh squad are confident of victory this afternoon. The game kicks off at 4.30pm (local time)
1 Dawn Mason
2 Jamie Kift
3 Catrin Edwards
4 April Dent
5 Liza Burgess
6 Jackie Morgan
7 Pip Minto
8 Kylie Wilson
9 Kerry Jenkins
10 Awen Thomas
11 Sue Jones
12 Melissa Berry
13 Louise Rickard
14 Claire Flowers
15 Kate Jones
GB7s women left their England base to train in Wales this week. Olympic Games hopeful Rachael Burford gives WRU TV's Graeme Gillespie her thoughts on Welsh teammate Jasmine Joyce - a 'one touch wonder'
The GB7s women's squad is currently training at Wales' Centre of Excellence where assistant coach Richie Pugh tells WRU TV's Graeme Gillespie some 'tough calls' will have to be made when it comes to finalising the 12 spots for Rio's Olympic Games.
Wales U20's Billy McBryde is looking forward to starting his first game against New Zealand this afternoon in the World Rugby U20 Championship where his side are looking to gain revenge from last week's pool defeat to the Kiwis.